Correct option is D
To find the total number of girls in the row, we use the formula:
Total number of girls = (Position from one extreme) + (Position from the other extreme) - 1
Here, Mahua's position from one end is 7, and from the other end is 11.
So, Total number of girls = 7 + 11 - 1 = 18 - 1 = 17.
Hence, the total number of girls in the row is 17.