If a is a positive integer then 4^(2a) + (64^a)/(2^(2a)) =  Choose the correct option:	A) 0	B) 16^16	C) 8^15	D) 2 × 16^a	E) 18^a
4^(2a) + 64^a/ 2^(2a) = 16^a + 36^a/4^a = 16^a + (64/4)= 
<gadget id="calculator">+ (64/4)</gadget>
<output>16</output>
16^a + 16^a= 2 × 16^a   Answer : 2 × 16^a
<result>D</result>
If a is a positive integer then 4^(2a) + (64^a)/(2^(2a)) =