19, 2, 38, 3, 114, 4, ? . Which term should replace the question mark in this series ?

19, 2, 38, 3, 114, 4, ? . Which term should replace the question mark

1.	19, 2, 38, 3, 114, 4, ? . Which term should replace the question mark in this series ?
A.	340
B.	380
C.	456
D.	486
Answer» D. 486