Which type of respiration is the most effective in frogs?

Explanation

Adult frogs use both lungs and moist skin for gas exchange, but pulmonary respiration through the lungs is generally treated as the most effective route for oxygen uptake during active terrestrial life. Students may choose cutaneous respiration because the skin is important in frogs, but it is especially important during rest or when submerged. Option b is the intended answer, although the misspelled alternatives make the item poorly edited.