In an examination hall, there are four rows of chairs. Each row has 8 chairs, one behind the other. There are two classes sitting for the examination with 16 students in each class. It is desired that in each row all students belong to the same class should sit and that no two adjacent rows are allotted to the same class. In how many ways can these 32 students be seated?

In an examination hall, there are four rows of chairs. Each row has 8

1.	In an examination hall, there are four rows of chairs. Each row has 8 chairs, one behind the other. There are two classes sitting for the examination with 16 students in each class. It is desired that in each row all students belong to the same class should sit and that no two adjacent rows are allotted to the same class. In how many ways can these 32 students be seated?
A.	2 x 16! x 16!
B.	2 x 16! x 15!
C.	2 x 15! x 15!
D.	2 x 14! x 16!
Answer» B. 2 x 16! x 15!