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D and E are points on the sides AB and AC respectively of `DeltaABC` such that DE is parallel to BC and AD:DB = 4:5, CD and BE intersect each other at F. Then the ratio of the areas of `DeltaDEF` and `DeltaCBF`.

A

`16:25`

B

`16:81`

C

`81:16`

D

`4:9`

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