Question

One of the main function of the state is to maintain law and order.

• A. main function for
• B. main functions of
• C. main functions for
• D. main functions off
• E. No correction required

Answer 1

The correct option is B main functions of

Expression 'one of the' is followed by a plural noun. So, 'main functions' is to be used here.
Eg: One of the main responsibilities of the court is to uphold fundamental human rights.