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Question

Give any four factors necessary for a healthy person.

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Solution

For a healthy person it is necessary that

(i) The surrounding environment should be clean so that air and water-borne diseases will not spread.
(ii) Personal hygiene prevents infectious diseases.
(iii) Proper nourishment of food and safe drinking water is necessary for the good immune system of our body.
(iv) Immunisation against severe diseases.

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