Correct the given sentence gramatically.

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

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

There was an old study

A-of marathon runners which

B-heart muscle during post-mortem

C-showed significant fibrosis of the

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".

I have always (baffle) by the unique melange of languages and dialects that India is home to.

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".

From the early 1990s, salaries shot up and stock options (were introduced).

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

A high degree of skill

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

The ability to make good judgements and take quick decisions

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

Silver bullet

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

Be worlds apart