Sequence

[naveenhv]

For how many integers n is 2^n = n^2 ?

a. None
b. One
c. Two
d. Three
e. More than three

[vineeshp]

OA C.

For 2,4 the equality holds.
For no other power of 2, the equality holds.

(non-powers of 2 cannot be considered, 2^n has to be a power of 2.)