Correct option is B
Given:
99 is related to 77.3.
84.4 is related to 62.7.
Logic: Difference is 21.7
For the first pair: 99-77.3=21.7
For the second pair: 84.4-62.7=21.7
To find the number related to 72.6, we subtract 21.7 from 72.6:
72.6-21.7=50.9
Thus, 72.6 is related to 50.9 following the same logic.
The correct answer is: (b) 50.9