What will be the output of the program? #include<stdio.h> #define SWAP(a, b) int t; t=a, a=b, b=t; int main() { int a=10, b=12; SWAP(a, b); printf("a = %d, b = %d n", a, b); return 0; }

• A. a = 10, b = 12
• B. a = 12, b = 10
• C. Error: Declaration not allowed in macro
• D. Error: Undefined symbol 't'