If a dozen apples weigh 1.8 kg in total, how many apples

Choose the correct meaning of the idiom/phrase given below :

be down with

Select the correct meaning of the given idiom.

On the spur of the moment 

Reap the whirlwind

A person who preserves skin of animals

Select the idiom/phrase that most accurately and contextually replaces the bolded segment.

Select the most appropriate meaning of the given idiom.

Make head or tail of something

to hit the headlines

When two heavyweights have an argument, its best to  sit on the fence  and not make either of the turn against you. 

In the following question, out of the given four alternatives, select the alternative which best expresses the meaning of the Idiom/Phrase.

He has to abide by the hard and fast rules of the company