Assertion (A): Rhizobium is used in the treatment of fungal infections.
Reason (R): Rhizobium forms nodules on the roots of leguminous plants.

(1) Both A and R are true, and R is the correct explanation
(2) Both A and R are true, but R is not the correct explanation
(3) A is true, R is false
(4) A is false, R is true

Assertion A is false because Rhizobium is not used to treat fungal infections. Reason R is true, as Rhizobium forms nodules on the roots of leguminous plants. Therefore, the answer is (4) A is false, R is true.
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Answered by Anonymous | 2025-07-04

This question involves understanding the roles and functions of Rhizobium, a type of bacteria.

Assertion (A): Rhizobium is used in the treatment of fungal infections.
Reason (R): Rhizobium forms nodules on the roots of leguminous plants.

Let's break down both the assertion (A) and the reason (R):

Assertion (A): Rhizobium is used in the treatment of fungal infections.

This statement is false. Rhizobium is not used to treat fungal infections. Rhizobium is a genus of bacteria known for its role in nitrogen fixation rather than in treating human diseases like fungal infections. It forms a symbiotic relationship with leguminous plants to help convert atmospheric nitrogen into a form that the plant can use.


Reason (R): Rhizobium forms nodules on the roots of leguminous plants.

This statement is true. Rhizobium bacteria indeed form nodules on the roots of legume plants (such as beans, peas, and lentils). These nodules are the sites where nitrogen fixation occurs.



In conclusion, the correct option is (4): A is false, R is true. Rhizobium does form nodules on the roots of leguminous plants, but it is not used for the treatment of fungal infections.

Answered by DanielJosephParker | 2025-07-06