In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one, which best express the same sentence in Indirect/Direct speech.

The professor said to the students, ‘Work hard if you want to pass the test.'

A

The professor said to the students work hard if they wanted to pass the test.

B

The professor said to the students work hard if you want to pass the test.

C

The professor advised the students to work hard if they wanted to pass the test.

D

The professor informed the students to work hard if you want to pass the test.