The correct option is
A Maximum : 2018, Minimum : 2017
Let us compare and arrange the number of students in the place value table.
The digit in the Millions place, in all the four is the same, at 1.
We have to compare the digits in the Hundred Thousands place.
The digits in the Hundred Thousands place are 3, 2, 9, and 7
Among these four, 9 is the biggest number, and 2 is the least number.
Arranging these digits in the descending order, 9>7>3>2
Now, we get
Hence, the maximum enrolment is during 2018 and the minimum enrolment is during 2017.