why was my quiz declined?

Question

so my quiz was:
int a[] = {1,2,3,4,5};
int *ptr = a;
cout<<3[ptr];
output :
option A - error
option B - 4
answer - option B - 4

Answer 1

The 3[ptr] notation is tricky and tricky questions are getting declined. I submitted 10 questions in Java and 6 of them are declined.

Answer 2

It is a good question. It may discover to a challenger the nature of C-language arrays. This could be useful for those who started programming from higher-level languages like Java.
But "int *ptr = a;" is overloading. Just "cout << 3[a];" would be enough. Be laconic. And give more options. It is easy to guess only from 2 ones.

Answer 3

i see. :) i believed thought provoking questions were a good idea. my bad.