Selecting Words - Verbal and Reasoning

Q1:

If negotiations are to prove fruitful, there must not only be sincerity on each side, but there must also be ...... in the sincerity of the other side.

A faith

B belief

C substance

D certainty

ANS:A - faith

Faith and belief have a bit difference, faith is used always in positive sense while belief may or may not used in positive sense. Here best choice is faith.