Correct Answer: uncertain

Solution : The second option is the correct answer.

The word dubious refers to a state of uncertainty or scepticism, indicating a lack of confidence or reliability in a particular situation or piece of information. On the other hand, the synonym uncertain also embodies the concept of doubt and a lack of surety.

The meanings of the other options are as follows:

• Notable refers to being worthy of attention or remarkable.

• Impressive denotes evoking admiration or respect.

• Unwilling means not willing or reluctant.

Therefore, the correct answer is uncertain.

Correct Answer: Sitar

Solution : The correct option is Sitar.

Ustad Vilayat Khan was a renowned Indian classical musician known for playing the Sitar. He was a legendary Sitar virtuoso and a prominent figure in the world of classical music. He received numerous awards and honours for his contributions to music, including the Padma Shri, Padma Bhushan and the Sangeet Natak Akademi Award.

Correct Answer: cbba

Solution : Given:
bb_aab_caab_ca_

To fill the series we have to divide the series – bb_aa / b_caa / b_ca_
Let's check each option –
First option: abac; bbaaa / bbcaa / bacac (No repeated pattern has been found.)
Second option: bcab; bbbaa / bccaa / bacab (No repeated pattern has been found.)
Third option: cbba; bbcaa / bbcaa / bbcaa (bbcaa is repeated in the series.)
Fourth option: acab; bbaaa / bccaa / bacab (No repeated pattern has been found.)

So, the series becomes bbcaabbcaabbcaa. Hence, the third option is correct.

Correct Answer: USSR

Solution : The correct answer is the USSR

The Soviet Union was part of the coalition called the "Allied Powers" in World War II. The Allied Powers, also known as the Allies, included several nations, with major contributors being the United States, the Soviet Union, the United Kingdom, China and others. They fought against the Axis Powers, which primarily consisted of Germany, Italy and Japan, during World War II.

Correct Answer: remarkable

Solution : The correct choice is the third option.

Explanation:
The reason remarkable is the most appropriate option is that it conveys the extraordinary and noteworthy nature of the coincidence. The meeting of the school friend at the cousin's house stands out as remarkable due to its unexpected and significant quality.

Therefore, the complete sentence would be: "Meeting my school friend at my cousin's house was a remarkable coincidence."

Correct Answer: What medicine have I been given?

Solution : The third option is correct.

Passive Voice Structure:

Start with the object of the active sentence (me).
Use the appropriate form of the auxiliary verb "to be" (have been) according to the tense of the main verb.
Use the past participle of the main verb (given).
Passive Voice: "What medicine have I been given?"

So, the structure for the transformation is:
Object of the active sentence + Appropriate form of to be + Past participle of the main verb

In this case:
me+have been+given

Therefore, the correct answer will be: What medicine have I been given?

Correct Answer: Cloud

Solution : The correct answer is Cloud.

The Cumulonimbus is a thick, towering vertical cloud created by strong upward air currents from water vapour. These clouds, including tornadoes and hailstones, are capable of generating lightning and other dangerous extreme weather. The abbreviation for Cumulonimbus is Cb.

Correct Answer: Albus told his friends that everyone was staring at them again.

Solution : The correct choice is the second option.

Indirect speech, also known as reported speech or indirect discourse, is a way of reporting what someone else has said without quoting their exact words.

Narration conversion:

• Change the reporting verb from "said" to "told".
• Change the first-person pronoun "us" to the third-person pronoun "them" to match the perspective of Albus in the reported speech.
• Change the verb tense from the present tense ("is staring") to the past tense ("was staring") to maintain the sequence of tenses.

Therefore, the correct answer is: Albus told his friends that everyone was staring at them again.

Correct Answer: 42

Solution : Given:
21, ?, 45, 180, 185

Add and multiply the consecutive numbers alternately to the previous term to obtain the next term.
21 × 2 = 42; 42 + 3 = 45; 45 × 4 = 180; 180 + 5 = 185

So, 42 is the missing term in the given series. Hence, the fourth option is correct.

Correct Answer: It inactivates them

Solution : The fourth option is the correct choice.

The passage in the third paragraph mentions that freezing inactivates the enzymes and microorganisms. This helps to preserve food.