The correct option is A
Composition scheme
The Composition levy scheme is a very simple, hassle free compliance scheme for small taxpayers. It is a voluntary and optional scheme. A taxpayer registered under composition levy scheme has to pay an amount equal to certain fixed percentage of his annual turnover as tax to the government. This tax has to be paid on quarterly basis.
Such taxpayer does not have to maintain elaborate accounts and records and instead of two monthly statements and a return (which a normal taxpayer has to file under GST), he has to file a simple quarterly return in FORM GSTR-04.