For integrated circuits photolithography is used to remove areas of a protective layer so that...

For integrated circuits photolithography is used to remove areas of a protective layer so that (a) Chemical reactions can take place in exposed areas. (b) Chemical reactions can take place in unexposed areas. (c) Chemical reactions can take place in transparent areas. (d) Chemical reactions can take place in translucent areas.
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Answer :

Chemical reactions can take place in exposed areas

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