Please answer this fast!!!

Dear Student

Correct option is (A).

Let the required number be x.

0.75 of x = 1200

 75   X x = 1200
100
x = 1200 x 100
             75

x = 1600

Required number is 1600.
5 of a number = 5 x 1600 = 1000
8                        8

Regards