Which of the following Statement is/are Correct?

I- The availability of Better education facilities is one of the Push factors in Rural to Urban Migration.

II- No Political or Class exploitation is one of the Pull factors in Rural to Urban Migration.

III- Less employment opportunities is one of the Push factors in Rural to Urban Migration.

Select the most appropriate antonym of the given word.

SPARSE

The science of colours.

The two parties signed a lengthy _________.

It took a lot of time in making both of them come to a comfortable mutual ___________.

Deadlock 

Exhilarate

Perpetual

Select the most appropriate word for the given group of words. 

A slowly moving mass or river of ice

A lady who remains unmarried 

Select the most appropriate meaning of the given idiom. "Go down like a lead balloon"

In the following questions, out of the four alternatives, choose the one which best expresses the meaning of the given word as your answer.