The correct option is
C 4,260,000 > 3,890,600 > 3,450,000 > 3,100,350
Let us place the numbers in a place value chart. Amongst the four numbers, 4 millions is the largest.
Among the remaining three numbers, the digits in the millions place is the same; hence, we have to compare the digits in the hundred thousands place.
On comparing the digits, we can arrange in the following way.
Hence, the number of students in the descending order is:
4,260,000 > 3,890,600 > 3,450,000 > 3,100,350