Assertion: Prolactin is an evolutionary conserved hormone.
Reason: It is influential in over 300 separate processes in various vertebrates, including humans.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.