2) There are 2n objects each of three kinds given to two persons, such that each person gets 3n objects. The number of ways of such distribution is equal to
a) 3n2 + 3n + 1
b) 4n-1C3n
c) 3n-1C2n
d) 3n2 - 2
2) There are 2n objects each of three kinds given to two persons, such that each person gets 3n objects. The number of ways of such distribution is equal to
a) 3n2 + 3n + 1
b) 4n-1C3n
c) 3n-1C2n
d) 3n2 - 2