Choose the correct alternative from the following : - Assertion (A) : The Indian Constitution came into force with effect from 26th January, 1950.
Reason (R) : 26th January is celebrated as the Republic Day.

B. BOTH A AND R ARE TRUE BUT R IS NOT THE CORRECT EXPLANATION OF A.

If it is possible to make a meaningful word with the third, the fifth, the seventh and the tenth letters of the word "PROJECTION' which of the following is the third letter of that word ?
If no such word can be made, give X as the answer. If more than one such word can be made, give M as the answer.

E. M

Six persons A, B, C, D, E and F are sitting in two rows, three in each.
E is not at the end of any row.
D is second to the left of F.
C, the neighbour of E, is sitting diagonally opposite D.
B is the neighbour of F. Who is facing B ?

Complete analogous pair - Ottawa : Canada : : Canberra : ?

D. AUSTRALIA

In following number series, two terms have been put within brackets. Choose the appropriate option - 2,6,12,20,30,42,56,x

D. 72