Explanation:
Let's find the difference between 7508 and the other numbers.
A. 5706 - 7508 = -1802
B. 6993 - 7508 = -515
C. 8108 - 7508 = 600
D. 8522 - 7508 = 1014
E. 1050 - 7508 = -6458
If we do not take +ve / -ve into account,
the closest number to 7508 = the smallest difference
which in this case, is B, 6993.