Unknown In a person who is acclimatized to high altitude for a long time, which of the following changes is seen? A Increased MCHC B Irregular respiration C Pulmonary arterial hypertension D Increased airway resistance 💡 Explanation In a person who is acclimatized to high altitude for a long time, which of the following changes is seen? ✓ Correct Answer: C. Pulmonary arterial hypertension