Q.

At noon, the Sun appears white as:

1 Blue colour is scattered the most  
2 Red colour is scattered the most  
3 Light is least scattered  
4 All the colours of the white light are scattered away  

Ans.

(3)

At noon, the sun is directly overhead and has lesser air to travel through, thus the distance to be travelled in air is reduced. Less scattering leads to the sun appearing white as only a little of the blue and violet colour is scattered.