A certain number of people are sitting in a row, facing north. Only Q sits exactly between W and Z. G sits sixth to the right of W. Only three people sit to the right of G. Z sits at the extreme left end of the row.
If no other person is sitting in the row, what is the total number of people seated? ​​

A certain number of people are sitting in a row, facing north.

Only Q sits exactly between W and Z.

G sits sixth to the right of W.

Only three people sit to the right of G.

Z sits at the extreme left end of the row.
If no other person is sitting in the row.

Total number of people seated is 12.

Thus, correct option is (b).