Regarding assertion and reason, select the right option.
Assertion (A): Androecium and gynoecium are called essential whorls.
Reason (R): The two important units of sexual reproduction namely male and female gametes are produced by androecium and gynoecium respectively.
Both A and R are correct and R explains A
Androecium consists of individual units called stamens which produce male gametes while gynoecium consists of carpel as their individual units. Carpels produce female gametes. Since the androecium and gynoecium are directly involved in sexual reproduction, they are called essential whorls of a flower.