Pneumoconiosis is caused by inhalation of

coal dust

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silica dust

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cotton fibres

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all of the above

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Solution

The correct option is D
all of the above

Pneumoconiosis is an occupational lung disease and a restrictive lung disease caused by the inhalation of dust, often in mines and from agriculture. All the options given here are correct.

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Question 2

(a) The constituent of the air that contains harmful gases and dust particles is known as _______.

(b) Shortness of breath and intense cough is mainly caused to the inhalation of ______ (polluted air / fresh air).

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