9 cups placed on a table in equal number of rows and columns, 6 cups contain coffee and 3 cups tea.

Q. There are 9 cups placed on a table arranged in equal number of rows and columns out of which 6 cups contain coffee and 3 cups contain tea. In how many ways can they be arranged so that each row should contain at least one cup of coffee ?

(a) 18
(b) 27
(c) 54
(d) 81