to bring to light : to make new information known to people
● After careful investigation all the facts of the case were brought to light. The best option is to reveal.

Correct Option: A

to bring to light : to make new information known to people
● After careful investigation all the facts of the case were brought to light. The best option is to reveal.

on the spur of the moment : suddenly, without planning in advance
● We decided to go on the spur of the moment. The best option is to act at once.

Correct Option: A

on the spur of the moment : suddenly, without planning in advance
● We decided to go on the spur of the moment. The best option is to act at once.

to have something up one’s sleeve : to have a secret plan
● I have something up my sleeve that will solve all your problems. The best option is to have a secret plan.

Correct Option: C

to have something up one’s sleeve : to have a secret plan
● I have something up my sleeve that will solve all your problems. The best option is to have a secret plan.

a red-letter day : an important day
● 15th August is a red-letter day in the history of India. The best option is an important or joyful occasion in one’s life.

Correct Option: C

a red-letter day : an important day
● 15th August is a red-letter day in the history of India. The best option is an important or joyful occasion in one’s life.

to explore every avenue : to investigate every possible means to find a solution to a given problem or to achieve a desired outcome
● We’ve explored all avenues but I just can’t see how we can continue living in this house. The best option is to try every opportunity.

Correct Option: D

to explore every avenue : to investigate every possible means to find a solution to a given problem or to achieve a desired outcome
● We’ve explored all avenues but I just can’t see how we can continue living in this house. The best option is to try every opportunity.