What should come in place of the question mark (?) in the following number series? `20, 40, 200, 400, 2000, 4000, ?

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Q 2329345211.     What should come in place of the question mark (?) in the following number series?

`20, 40, 200, 400, 2000, 4000, ? `
A

200

B

400

C

20000

D

40000

E

None of these

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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