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Which of the following usually cannot act as an allergen?

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in Biology – Class 12 by (271k points)
Which of the following usually cannot act as an allergen?

(a) Pure Water

(b) Pollen

(c) Dust

(d) Shellfish

This question was posed to me in unit test.

Question is taken from Human Health and Disease topic in division Human Health and Disease of Biology – Class 12

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Best answer
Right choice is (a) Pure Water

For explanation: Pure water usually cannot act an allergen to an individual because it is free of impurities. Allergen is any foreign substance or agent that produces hypersensitivity in an individual. For example, pollen, spores, dust, scent, wool, drugs like penicillin, egg white, fur, feathers, shellfish, etc.

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