n is an integer between 40 and 90, then any of the following could be n + 8 except -

Question: n is an integer between 40 and 90, then any of the following could be n + 8 except -

Solution:
if n is a positive integer, then 40 < n < 90
from option (4)
n + 8 = 99
n = 91

its not possible