Who was called "Light of the world"

Consider the statements

Assertion (A) : National Girl Child Day is celebrated on 24th of January every year in India

Reason (R) : It si to raise awareness among people that boy child is not always a blessing

Choose your answer from the options below:

With which country, does China describe it's ties, as 'iron brothers

Pressure cookers are based on the principle that

1. The boiling point of liquid increases with increase in pressure
2. The boiling point of liquid decreases with increase in pressure
3. The boiling point is constant

Which one of the above is correct principle

The Tamil Nadu Poompuhar won the National E-Governance for Silver Award in 2016-17

Name the first women President of India