What will come in place of the x in the following Number series? 25, 100, x, 1600, 6400	Choose the correct choice from the following answers:  A) 6400  B) 6900  C) 7340  D) 7500  E) 7900
(6400)   25 x 4 = 100, 100 x 4 = 400, 400 x 4 = 1600, 1600 x 4 = 6400.
<result>A</result>
What will come in place of the x in the following Number series? 25, 100, x, 1600, 6400