1,3,3,9,27,243,? Choose one:
A) 6565	B) 6661	C) 6861	D) 6561	E) 6531
Each number is the product of the previous two numbers, ie  27*243= 
<gadget id="calculator"> 27*243</gadget>
<output>6_561</output>
6561.   Answer : 6561
<result>D</result>
1,3,3,9,27,243,?