Insert the missing number. 12, 25, 49, 99, 197, 395, X Choose the correct choice from the following options:	A) 579	B) 722	C) 780	D) 812	E) 789
Each number is twice the previous one with 1 added or subtracted alternatively.   395X2-1=789
<result>E</result>
Insert the missing number. 12, 25, 49, 99, 197, 395, X