Question

Assertion (R) Parietal placentation is observed in pea plant.
Reason (R) In pea plant, the placenta forms a ridge along the ventral suture of ovary and ovules are borne on this ridge forming two rows.

• A. If both A and R are true and R is the 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

Answer 1

Answer: (D)

Assertion is false, but Reason is true. Assertion can be corrected as
In marginal placentation, one or two alternate rows of the ovules occur longitudinally along the ridge in the wall of the ovary in the area of fusion of its two margins or ventral suture. A true placenta is believed to be absent.
Ovary is unilocular. Marginal placentation is found in monocarpellary pistils of Leguminosae (e.g. pea, Cassia, Acacia) and other plants (e.g. Larkspur).