The material used in the construction of a standard resistance is constantan. Reason: The temperature coefficient of resistance of constantan is negligible. Which of the following is correct?
1) Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
2) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
3) The assertion is true, but the reason is false.
4) The assertion is false, but the reason is true.