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Solutions
1) Three people sit between Q and M.
Here, we have two possible cases i.e. Case 1 and Case 2.
2) U sits second to the right of Q.

3) Two people sit between M and B who does not sit adjacent to Q.
4) The number of people sit between U and M is same as the number of people sit between G and M.
5) Two people sit between G and Y who does not sit to the immediate right of U.

6) Two people sit either to the left or to the right of Q.
7) Y sits second to the right of Z who sits to the immediate right of C.
Here, Case 2 gets eliminated.
8) C sits at second position from one of the extreme ends.
Here, we have the final arrangement:

Clearly, nine people sit between M and the one who sits second to the right of C.