Correct Answer: Population

Solution : The correct option is Population.

Thomas Robert Malthus in his work An Essay on the Principle of Population proposed the Malthusian hypothesis as a theory of population rise. The hypothesis contends that while the expansion of the food supply or other resources is linear,

Correct Answer: Hetrocercal

Solution : The correct option is Hetrocercal.

Sharks have a heterocercal tail structure. Heterocercal tails have an asymmetrical form, with the top lobe of the tail being bigger and extending further than the lower lobe. This shape gives sharks lift and stability in the water, which helps

Correct Answer: Ti

Solution : The correct option is Ti.

Titanium is frequently utilised to endure high temperatures in spacecraft and aeronautical applications. Titanium has outstanding heat resistance qualities, retaining structural integrity and strength even at high temperatures. It is also lightweight, which is important for spaceship design since it

Correct Answer: None of these

Solution : Given: A dishonest dealer defrauds to the extent of $x$% in buying as well as selling.
Let the total cost of an article be Rs. 100.
The cost price (CP) of that article for the dishonest dealer = Rs. (100 – $x$)
The

Correct Answer: Copper

Solution : The correct option is Copper.

The mineral malachite is distinguished by its vivid green hue and recognizable banded or swirled patterns. It is a mineral of copper carbonate and hydroxide and is frequently discovered with other copper ores. Malachite is prized for its usage

Correct Answer: realise

Solution : The most appropriate choice is the third option.

Realise means to become aware of something, and it is the most appropriate word to convey the meaning that the teacher should recognise or be conscious of this issue.

The meanings of the other options are as

Correct Answer: Boats

Solution : Given:
Bird : Airplane :: Fish : ?

Both birds and airplanes use air as a means of movement.
Similarly, both fish and boats use water as a means of movement.

Hence, the third option is correct.

Correct Answer: 76$^\circ$

Solution : First exterior angle = 121$^\circ$
Second exterior angle = 104$^\circ$
The sum of all the exterior angles of a triangle is 360$^\circ$
Let the three interior angles be A, B, and C and the third exterior angle be x
⇒ 121$^\circ$ + 104$^\circ$ + x

Correct Answer: 2.1

Solution : Given:
$\frac{3.35^2-1.25^2}{3.35+1.25}$
Using identity $a^2-b^2=(a+b)(a-b)$, we get:
 $=\frac{(3.35+1.25)(3.35-1.25)}{3.35+1.25}$
$= (3.35-1.25)$
$= 2.1$
Hence, the correct answer is 2.1.

Correct Answer: Shahna-i-mandi

Solution : The correct answer is Shahna-i-mandi.

In Delhi, Alauddin Khalji established three markets. Each market was overseen by a high officer, a 'Shahna', who kept a merchant register and strictly monitored shopkeepers and pricing. This register listed the merchants' names, occupations, and places of business.