When is the World Population Day observed ?

• May, 31st
• October, 4th
• December, 10th
• July, 11th
Correct Option: D  [ July, 11th ]

Remark:

Whose birthday is observed as 'Mathematics Day' in India ?

• C.V. Raman
• Bhaskaracharya
• Srinivas Ramanujan
• Thomas Hardy
Correct Option: C  [ Srinivas Ramanujan ]

Remark: 22 December.