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[A] : Pinus bears resin canals . [R] :...

[A] : Pinus bears resin canals .
[R] : Resin canals are found in cortex and bounded by a glandular epithelial layer that secretes resin.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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