This is the correct option, as pass muster means doing something satisfactorily. The entrance exam was very tough, but I hope I will pass muster.

This is the correct option. A person who lives the life of Riley has a comfortable and enjoyable life, without having to make much effort. After her marriage to a millionaire, she has been living the life of Riley. All her worries and tensions are now over!

This is the correct option. To jump the gun implies to do something before it should be done. The doctors did not want to jump the gun to give a reason for the outbreak before the investigation was completed.

This is the correct option. A light bulb moment is when you have a sudden moment of inspiration, comprehension or realization. Sunil had a light bulb moment when he finally realised what was the problem in his computer. He sorted the problem and now his computer is working fine!

This is the correct option. To sell someone down the river means to do something which harms or disappoints someone who trusted you. The public, in general, feels that all the political parties have sold them down the river. The public trusts none of the parties now!

This is the correct option. Going under the knife means undergoing medical procedures or surgery. The heroines these days go under the knife to look beautiful and young. But in reality, it is otherwise!

This is the correct option. Threw in the towel implies that one is going to quit. Amit could not bear the insults being meted out by his brother. He threw in the towel and left!

This is the correct option. It means to be in an angry disagreement. The neighbor's are at each other's throat over who will pay to repair the broken wall. No one is willing to spend a dime.

This is the correct option. To take a backseat means to become less important than something else. The studies had to take a backseat due to cricket. Afterall, I was the captain of the school team.

This is the correct option. To be put on back burner means to be put aside for the time being. With the arrival of a new minister, the issue of transfers was put on back burner. It will take time for the new transfers to get his approval.

This is the correct option. At the end of rope means at the end of one's patience or endurance.The antics of these boys are driving me crazy. I am at the end of rope.

This is the correct option. To be off the hook implies to be free from obligation or avoiding a difficult situation. He felt relieved to be off the hook on the harassment charges as he was completely innocent.

This is the correct option. Something that is beyond recall is impossible to retrieve or cancel. I am afraid we cannot recover the data in your laptop. Your laptop is beyond recall.

This is the correct option. It means to get something started. This Govt. sponsored scheme will get off the ground by the end of next year. A lot of planning needs to be done.

This is the correct option. To take it on the chin means to receive the full brunt of something. Why should Rahim take it on the chin for something he did not do? He is absolutely innocent.