X, Y and Z enter into a partnership, X invests some money at the beginning. Y invests thrice the amount of X after 4 months and Z invest double the amount of Y after 9 months from the beginning. If the annual gain be Rs. 150000, then what is the share of Y?

A

Rs. 200000

B

Rs. 150000

C

Rs. 100000

D

Rs. 300000