The standard English sentence order is Subject-Verb-Object.

For example ::

In the sentence, Why did you (S) do (V) that (O)?

Required number of 5 digit numbers can be formed by using the digits 1, 0, 2, 3, 5, 6 which are between 50000 and 60000 without repeating the digits are 

5 x 4 x 3 x 2 x 1 = 120.

National Deworming Day is observed in our country India to reduce the cases of worm infections among kids, on 10th February every year. It was observed for the first time in 2015.

The closet point in the Moon's orbit to Earth is called perigee whereas the farthest point in the Moon's orbit to Earth is called apogee.

From the given options, Though is the only word which gives sense for the sentence. Hence, Though pompous he was an entertaining person.

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

Solution:

5 greater than 4.

Answer: (a)