$$(47)^{25}-1$$​ is exactly divisible by:

Correct option is C

Given:

$$(47)^{25} - 1$$​​

Concept Used:

​$$a^n -$$​1 is divisible by a - 1

Solution:

​$$(47)^{25} -$$​1 is divisible by 47 - 1 = 46

​$$(47)^{25} -$$​1 is also divisible by 23.