Assertion (A) : An anther is tetrasporangiate.
Reason (R) : An anther with four microsporangia or pollen sacs.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true
Since an anther is tetrasporangiate, or having four microsporangia or pollen sacs, Assertion A is true. A bilobed anther produces four pollen sacs because each anther lobe creates two of them. Tetrasporangiate anthers are defined as having four pollen sacs or microsporangia. A tetrasporangiate anther has four microsporangia or pollen sacs, which is likewise true. As a result, Reason R adequately justifies Assertion A. Hence, option 1 is the correct answer.