To understand the answer to this question, the user needs to have knowledge of basic programming concepts, specifically the syntax and rules of the programming language being used. In this case, it appears to be a C programming language snippet.

Now, let's go through each option and explain why it is right or wrong:

A. is correct: This option is incorrect because the statement 16 = m is using the assignment operator (=) in reverse. In C programming, the assignment operator is used to assign a value to a variable, not to compare values. The correct way to compare values in C is to use the equality operator (==). Therefore, the statement should be written as if (16 == m) printf("m is 16");.

B. has syntax error: This option is correct. The given statement 16 = m has a syntax error because it is using the assignment operator (=) in reverse, which is not allowed in C programming. The correct way to compare values in C is to use the equality operator (==). Therefore, the correct syntax should be if (16 == m) printf("m is 16");.

C. causes run-time error: This option is incorrect because the given code does not have a run-time error. It has a syntax error, as mentioned in option B, but it will not cause a run-time error because it will not compile successfully.

D. none of the above: This option is incorrect because option B is correct. The given code has a syntax error and will not compile successfully.

Therefore, the correct answer is:

The Answer is: B. has syntax error