Assertion (A) : Cleistogamous flowers produce assured seed set in the absence of pollinators.
Reason (R) : Cleistogamous flowers are bisexual and do not open at all.

• A

  If both A and R are true and R is correct explanation of A

• B

  If both A and R are true, but R is not the correct explanation of A

• C

  If A is true, but R is false

• D

  If A is false, but R is true