Study the given pattern carefully and select the number that can replace the question mark (?) in it.

​

Given,

Following the logic here :

Bottom Number = (First Number² ) − (Second Number²)

​Applying this pattern: 

​$$6^2 - 2^2 = 36 - 4 = 32$$

​​$$9^2 - 6^2 = 81 - 36 = 45$$

​​$$4^2 - 1^2 = 16 - 1 = 15$$

Similarly,

Thus the correct answer is: Option C