Question

Everybody has heard of the Dandi March. (Begin: Who....)

Answer 1

Old sentence - Everybody has heard of The Dandi March.

Here, we have to begin the sentence with the word who.

The correct sentence would be -

Who has not heard of The Dandi March.

Explanation -

In order to begin the sentence with the word who, we need to change it to a negative sentence by using the word not.

Answer 2

Who has not heard of the Dandi March?

This ought to help.