Statement I: Aestivation is the term for the period of inactivity in frogs during extreme cold.

Statement II:The skin of frogs is dry and rough due to the presence of scales.

Both statements I and II are incorrect.

 The correct answer is Option : (4) Both statements I and II are incorrect.

Statement I: Aestivation is the term for the period of inactivity in frogs during extreme cold. This statement is incorrect. Aestivation is the term used for the period of inactivity in frogs during extreme heat, not extreme cold. During aestivation, frogs take shelter to escape high temperatures and dry conditions, which typically occur during hot summer months.

Statement II: The skin of frogs is dry and rough due to the presence of scales.This statement is incorrect. The skin of frogs is smooth and moist, not dry and rough. Frogs have a moist and glandular skin covered in mucous glands, which helps keep their skin moist. Unlike reptiles, frogs do not have scales. The moist skin is essential for cutaneous respiration, where gases, including oxygen and carbon dioxide, can be exchanged through the skin.