Mr Mukesh has joined the organisation 4 years back as an officer. He stays with his wife and two children. Neither he nor his wife owns a house. You need to take a decision :

Both courses of action are not strong.

All are volatile except iron.

In all pairs except (d), first is used to contain the second.

All are the currencies of different Countries.

1/9 : 1/9² : : 1/13 : 1/13²

Second is obtained from the first .

We can write with pen, marker, pencil on paper. So, paper is defferent from others.