option of registration

yes offcourse he can opt for composition scheme. please select composition option at the time of making registration under GST.

Ensure his turnover is less than 75 lacs.

Disadvantage:

He has to pay 2% tax on his turnover. 

he cant sell out of state

he cant take input credit, and no registered dealer will sell him raw material 

go ahead with composition option after considering above disadvantages.