What is the output of the following snippet of C code: int num =3 switch (num) \& case 1: printf("1 "); break; case 2: printf("2 "); break; case 3 : printf("3 "); default: printf("Unknown'n"); \} 3 wreak: case 2 : printf("2 "); break; case 3: printf("3 "); default: printf("Unknown'n"); 3 3 Unknown 3 Unknown 2 1