Assertion (a): 2-chloro-3-methylbutane on treatment with alcoholic potash gives 2-methylbut-2-ene as the major product. Reason (r): The reaction occurs according to the Saytzeff rule. Which of the following options is correct?
1) Both assertion (a) and reason (r) are true, and reason (r) is the correct explanation of assertion (a).
2) Both assertion (a) and reason (r) are true, but reason (r) is not the correct explanation of assertion (a).
3) Assertion (a) is true, but reason (r) is false.
4) Assertion (a) is false, but reason (r) is true.