Statement-I    If  7 and 9 are factors of ‘x’, then 63 is also the factor of  x 

Statement-II    Sum of all prime factors of ‘t’ is 5, then one of them t = 36

Statement A : If a and b are factors of x then their product is also factor of x.

7 and 9 are factor of x then their product $7\times 9=63$ is also factor of x

Statement B : Sum of all prime factors of ‘t’ is 5, then $5=2+3$

So 2 and 3 are factors of 36.