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[A] : Haversian canals are inter connect...

[A] : Haversian canals are inter connecting canals that run usually longitudinally through dense bone of vertebrates.
[R]: They contain nerves and blood. Each canal serving a series of concentric Iamellae

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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The correct Answer is:
B
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