Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason \(R\). Assertion \(A:\) Alloys such as constantan and manganin are used in making standard resistance coils. Reason \(R:\) Constantan and manganin have very small value of temperature coefficient of resistance.In the light of the above statements, choose the correct answer from the options given below.

1. A Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\).
2. B Both A and R are true but \(R\) is NOT the correct explanation of \(A\).
3. C \(A\) is true but \(R\) is false.
4. D \(A\) is false but \(R\) is true.