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Assertion (A): Meter bridge wire is generally made of constantan.

Reason (R): Constantan has a very low thermal coefficient of resistance.

In the light of the above statements, choose the most appropriate answer from the options given below.

A
Both (A) and (R) are correct and (R) is the correct explanation of (A)
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
C
(A) is correct but (R) is not correct
D
Both (A) and (R) are incorrect
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