Correct Answer: 160

Solution : Number of students who opted for Biology in School D
= 20% of 800
= $\frac{20×800}{100}$
= 160
Hence, the correct answer is 160.

Correct Answer:

Solution : According to the given figures –
1. X and triangle interchange their positions at each step.
2. O and T interchange their positions at each step.
3. At each step, a new character/symbol is introduced which replaces the center element.

So, following the above pattern, the

Correct Answer: AB = PQ by SAS

Solution : In a $\triangle \mathrm{PQR}$ and $\triangle \mathrm{ABC}$,


$\angle$P = $\angle$A
AC = PR
For triangle PQR and ABC to be congruent if AB = PQ then they will be congruent by SAS rule.
Hence, the correct answer is AB = PQ

Correct Answer: 12 cm

Solution : Given: The volume of a right circular cone = $196\pi\ \text{cm}^3$
Diameter of base = 14 cm
Radius = 7 cm
Volume of the cone = $\frac{1}{3}\pi r^2 h$
⇒ $196\pi = \frac{1}{3}\pi r^2 h$
⇒ $196 = \frac{1}{3}\times7\times7\times h$
⇒ $h = 12\

Correct Answer: NFTLVN

Solution : Given:
HUSTLE is written as SFHEOT, and BRIGHT is written as IIBTSG.

Interchange the position of the first and third, fourth and sixth letters, and write the opposite letter of the second and fifth letters of HUSTLE, to obtain the required code –

Thus, HUSTLE

Correct Answer: Chemotherapy

Solution : The correct option is Chemotherapy.

Chemotherapy is a medicinal therapy that uses potent chemicals to kill the body's rapidly proliferating cells. Chemotherapy is most frequently used to treat cancer because cancer cells reproduce and develop considerably more quickly than the majority of body cells.

Correct Answer: My leave

Solution : The correct answer is the second option.

The word leave is appropriate in this context to indicate that the person is departing or saying goodbye. So, the correct answer is leave.

The meanings of the other options are as follows:

Departure: It denotes

Correct Answer: There are three cars parked outside: a Mercedes, a Jaguar and a Fiat.

Solution : The correct choice is the third option.

Explanation:

• "A" is the indefinite article used before singular countable nouns. In this case, "Mercedes," "Jaguar," and "Fiat" are all singular countable nouns representing

Correct Answer: 6 years

Solution : Given: A sum of money becomes double in 3 years at compound interest compounded annually.
If $P$ becomes $xP$ in $n$ years then $P$ becomes $x^kP$ in $kn$ years when interest is compounded annually.
Let the sum be P.
After 3 years, P becomes

Correct Answer: tissue culture technique

Solution : The correct option is the tissue culture technique.

Tissue culture can produce a large number of plants in a relatively short period. It is a method used to propagate plants by taking a small piece of plant tissue, such as a stem