निम्नलिखित में से

On which day does the difference between day and night lengths reach its maximum?

Number of bones in adult human body are?

Which one of the following is responsible for nuclear fission?

Choose the correct statements regarding the process of photosynthesis. 

_______ fiber is used in making bulletproof vests.

Rustom-2 is a/an __________ developed by India's Defence Research and Development Organisation (DRDO).

The scientific name of vitamin B12 is :

A satellite is used for

What is the dominant component of Earth's atmosphere?

Who discovered the virus?