Which of the statements are true for respiration? i. Ribs move inwards and diaphragm is raised during inhalation ii. gaseous exchange occurs at alveoli of lungs iii. Haemoglobin has greater affinity for carbon dioxide than oxygen iv. Alveoli increases surface area for exchange of gases A. i and iv. B. ii. and iii. C. i and iii. D. ii. and iv.
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D. ii and iv are the correct answer
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