Correct the given sentence gramatically.

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

Improve the bracketed part of the sentence.

The Securities and Exchange Board of India (SEBI) (has decreed) that all MF schemes must adopt the Total Return variants of their chosen benchmarks to measure and disclose their performance.

Improve the bracketed part of the sentence.
Bull markets, John Templeton said, are born on pessimism, grow on scepticism, mature on optimism and (die for) euphoria.

Improve the bracketed part of the sentence.

The Chairman (send in) all the right signals and we can only hope that his trip will result in rich dividends.

Improve the bracketed part of the sentence.

The telecom sector is the backbone to the Digital India vision and it deserves an (enabled) regulatory environment.

Improve the bracketed part of the sentence.

The Centre can’t afford to procrastinate any further (at) framing rules to regulate the trading and use of bitcoin and other virtual currencies.

Improve the bracketed part of the sentence.

Mixed cropping should be encouraged both as a (hedge for) price risk and for its ecological benefits.

Improve the bracketed part of the sentence.

The granaries of India are trapped in a dangerous vicious cycle of input use, where increased dumping of fertiliser in the wrong combinations (has rendered) the soil incapable of regenerating itself, which in turn escalates input use.

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

A statement which is accepted as true without proof.