The number of elements in sets G and A are 3 and 4 respectively. For (A):G×G to G
The number of non bijective functions is, G×G to G=39 =19683 A to A
Here a has four choice, b has 3 choice c has 2 choice and d has one choice. So, number of bijective functions from A to A is, 4×3×2×1=24 For (C): G to G×A
The number of bijective functions from G to G×A is, 123=1728 For (D): A to A×A The number of surjective from A to A×A is, 4 to 16 is 0 So, option (1) is correct.