Which of the following genotype will be producing 4 different types of gametes?

The number of types of gametes will be given by the formula 2nWhere n is the number of heterozygous conditions.To produce 4 different types of gametes we need 2 heterozygous condition.Two heterozygous condition is found in AABbCCDDEe. Here the B gene and the E gene are present in heterozygous condition. Therefore, number of types of gametes= 22= 4For AABBCCDDEeNumber of types of gametes= 21= 2For AaBbCCDDEeNumber of types of gametes= 23= 8For AaBbCcDDEeNumber of types of gametes= 24= 16