Lets take all the options one by one.
Given, a=32, b=2, c=3.
(A) b*2 is 4. switch(4) will execute case 4, which will give output as 2, after that control will come out of switch block due to break.
(B) b*c-2 is 4. Output will be same as above.
(C) b+c*2 is 8. switch(8) will execute case 8. So, 3 will be printed. But since there is no break statement, default will also be executed. So, 2 will be printed. Hence, 32 will be the output.
So, option (C).