The third proportional to 2 and 4 is?
Choose one:
A) 8 B) 7 C) 4 D) 5 E) 3
(4*4)/2= 
<gadget id="calculator">(4*4)/2</gadget>
<output>8</output>
8   8nswer:8
<result>A</result>
The third proportional to 2 and 4 is?