Correct option is D. $$(-32) \div 9$$
Option (d) is correct.
(a) $$\dfrac{(-100)}{5}=-20$$
(b) $$\dfrac{(-81)}{9}=-9$$
$$(c)$$$$\dfrac{(-75)}{5}=-15$$
$$(d)$$$$\dfrac{(-32)}{9}=\dfrac{-32}{9}$$
By the above calculation, we can see that option d is not an integer while other options are integers. Thus, option d is different from all others.