Answer: The answer is (a) 10.
Step-by-step explanation: We are given a line on which five different points are plotted, A, B, C, D and E. We are to find the total number of labelled line segments in the given figure.
We can see the line segments which are labelled in the figure are
AB, AC, AD, AE, BC, BD, BE, CD, CE and DE.
Therefore, there are 10 labelled line segments in the figure.
Thus, (a) 10 is the correct option.