Assertion: XX-XY type of sex determination mechanism is an example of female heterogamety, and is found in Drosophila.
Reason: Male heterogamety is seen in months where males produce two different types of gamete.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not correct explanation of A
(c) A is true but R is false
(d) A and R are false