Question

Assertion (A): All excretory products of plants are useless for humans.
Reason (R): Plant excretory products include gums and resins.

• A. A and R are correct and R is a correct explanation of A.
• B. A and R are correct but R is not a correct explanation of A.
• C. A is correct but R is incorrect.
• D. A is incorrect but R is correct.

Answer 1

The correct option is D A is incorrect but R is correct.

Gums and resins are plant excretory products that are useful for humans. Gums are used in manufacture of medicines and in cosmetic products. Resins are used in the production of adhesives and food glazing agents. Hence, the assertion that all excretory products of plants are useless to humans is incorrect.