Correct option is B
Given:
A certain number of people are sitting in a row, facing North.
1) D sits to the immediate right of H.
2) A is third to the left of C
3) Only three people sit between H and L
4) L is fifth to the right of C
5) D is at the extreme right end of the row
From the given information arrangement will be:

Hence, "14" total number persons are seated.
Thus, correct option is (b).