Correct the given sentence gramatically.

Shreya, who she is my best friend, is a singer.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Decay of organic matter producing a fetid smell

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Take away or alter the natural qualities of

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

Take out your binoculars and (will see) the Andromeda galaxy.

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

A small makeshift stage (was construct) with a red curtain for a backdrop.

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Spin one's wheels

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Rat race

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.

Sentience

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.

Incapacitate