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Q.

The bristles of toothbrush are made up of nylon. Which of the following properties of nylon make it most suitable for this purpose ?

I) High water absorption tendency
II) More strength in wet condition
III) Resistance towards bacteria and fungus
IV) Transparency, clarity and weight

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a

I and II

b

I and IV

c

I, II and III

d

II and III

answer is C.

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Detailed Solution

Nylon does not absorb water, so it is useful for long time use as cleaning of tooths.

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