Correct option is B
Let's analyze the relationship between the given pairs:
27:16
33 (cube of 3) : 42 (square of 4).
This suggests the pattern is the cube of a number followed by the square of its consecutive number.
125:?
53 (cube of 5) : 62 =36. (square of 6).
Thus, the number that best completes the relationship is 36.
The correct answer is: (b) 36.