there are five networks 172.16.0.0 through 172.16.4.0 and all options in the answer section are same 255.255.254.0.
My calculations say correct answer should be 255.255.248.0
But no way to choose the correct answer
The correct answer is indeed the one with a subnet mask of 255.255.248.0. I will let Rene know to make the correction to the possible answers.