GST Question for Today:- Which of the following statements is | CA Inter Knowledge Portal

GST Question for Today:- Which of the following statements is correct for a tax payer who has opted for composition scheme?
a) A registered person supplying goods/services under the composition scheme shall issue a bill of supply.
b) Last date for payment of liability towards tax, interest, penalty, fee or any other sum is 20th day of each month.
c) A composition dealer shall be required to file GSTR-1 and GSTR-3B on monthly basis.
d) A composition dealer has an option to file GSTR-3B on quarterly basis, however tax payment has to be made on monthly basis upto 25th of next month