What should come in place of the question mark (?) in the given series?

17, 64, 103, 134, 157, ?

17, 64, 103, 134, 157, ?

Logic: ​The differences between terms decrease by 8 each time:+47, +39, +31, +23, +15.​

So, the next number will be: (157 + 15) = 172

Thus, the correct option is: (c) 172