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In DeltaABC, PQ is parallel to BC, while...

In `DeltaABC`, PQ is parallel to BC, while P and Q are at AB and AC respectively. If AB = 3AP, then what is the ratio of areas of triangles `DeltaAPQ` and `DeltaABC`.

A

`1:3`

B

`1:5`

C

`1:7`

D

`1:9`

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