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Explanation:

From statement A

bc = cd

If c is the midpoint of bd it would also be midpoint of ae because circles are concentric.

∴ ac = ce

∴ The question can be answered using statement A alone.

From Statement B

If c is the point on the line joining the two centres, it has to bisect the chord bd.

∴ c will also bisect the chord ae as the circles are concentric.

∴ ac = ce

∴ The question can be answered using statement B alone also.

Hence, option (b).

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