The set of all real numbers $x$ for which $3^{2^{1-x^2}}$ is an integer has (A) 3 elements (B) 15 elements (C) 24 elements (D) infinitely many elements
The set of all real numbers $x$ for which $3^{2^{1-x^2}}$ is an integer has\\
(A) 3 elements\\
(B) 15 elements\\
(C) 24 elements\\
(D) infinitely many elements