• Evaluation of Statements:
• Assertion (A): Size of the egg varies with the species and within the species.
• True. Egg weight and volume vary widely across avian taxa (e.g., quail $\approx 10\text{ g}$, chicken $\approx 55-60\text{ g}$, duck $\approx 70-80\text{ g}$, ostrich $\approx 1500\text{ g}$), as well as within species according to breed, age, and nutrition.
• Reason (R): Generally the egg size in Indian ducks is smaller than Indian chickens.
• False. Duck eggs (average weight $65 - 75\text{ g}$) are considerably larger and heavier than chicken eggs (average weight $50 - 58\text{ g}$).
• nalysis:
• ((A) is true but (R) is false): Correct.

Correct option: (3) (A) is true but (R) is false