Assertion: XX-XY type of sex determination mechanism is an example of male heterogamety.
Reason: In birds, male heterogamety is seen as males produce two different types of gametes.
A. If both assertion and reasons are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If the assertion is true but reason is false.
D. If both assertion and reason are false.