Coal Tar is not used in the manufacture of :

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Synthetic dyes

Drugs

Perfumes

Coke

answer is D.

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Detailed Solution

Coal tar is obtained as a product in the process of making coke. Hence, it is a by-product of coke and it can not be used in the manufacturing of coke.
Coal tar is used as starting material in the manufacturing process of various substances that we use in everyday life and in industry, like synthetic dyes, drugs, explosives, etc.
Coal tar can be both used in medical and industrial fields.
Naphthalene balls are obtained from coal tar. They are used to repel moths and other insects.
They are also used in the preparation of explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc.

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