Without a developer, the images created on photographic film would not be visible. When a photographic film is developed, there is a visible blackening of the film around the tiny particles where light has fallen. This developer is, chemically.

A catalyst

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An oxidising agent

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A reducing agent

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A solvent

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Solution

The correct option is C A reducing agent
Silver chloride is reduced to silver so developer must be reducing agent. Reducing agent is generally Gelatin.

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