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 best expresses the meaning of the idiom/Phrase.
Live from hand to mouth

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

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

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

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

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
Only when _____ failed, the army resorted to force.

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
Virat Kohli added another feather _____ his cap by his wonderful performance in the one day match.

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No error'.
The reason for (1)/ his failure is because (2)/ he didn't study at all. (3)/ No Error (4)