Clubbing of income

please experts advice me regarding matter. if there are 3 fd's each of rs. 100000 on the name of mother and 2 minor son and if interest on fd is deposited in one bank account in which there are 3 joint holder mother and 2 minor son then whether it is to be show as income in return and if yes then in whose return it is to be shown whether in father or mother. plz experts advice me regarding this