While assessing a low income housing colony for adequacy of ventilation, a public health officer applies the conventional Indian standard for fresh air requirement based on cubic space per occupant. As per Park's textbook, the recommended minimum is approximately:

• A 2500 cubic feet per person
• B 1500 cubic feet per person
• C 1000 cubic feet per person ✓
• D 500 cubic feet per person

Explanation

Indian preventive medicine teaching follows the recommendation of about 1000 cubic feet (roughly 28 cubic metres) of cubic space per person for adequate ventilation of living rooms, derived from calculations of air renewal needed to keep carbon dioxide levels acceptable. Values of 500 cubic feet are clearly inadequate, while 1500 and 2500 exceed the conventional standard quoted in examinations.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

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