Assertion : Leguminous plants are nitrogen fixers.
Reason : Leguminous plants have Rhizobium in their root nodules

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

Species of rod-shaped Rhizobium live symbiotically within the roots of several leguminous plants such as alfalfa, sweet clover, sweet pea, garden pea, clover pea etc. These bacteria produce small outgrowth on the surface of legume roots that can fix atmospheric nitrogen.