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Question

Prism is to Light as Filter is to _____

This question was previously asked in
SSC Selection Post 2025 Graduate Level Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

Air

Air is correct.

The pair Prism : Light links a device with the medium that passes through it and is acted upon by it. A glass prism lets light pass through it and, while doing so, splits (disperses) white light into its seven component colours.

In the same way, a filter is a device through which a medium passes and is acted upon. An air filter lets air pass through and cleans it on the way, so Filter : Air mirrors Prism : Light.

Dust and Impurity are not what flows through a filter; they are what the filter catches and removes, and dust is itself one kind of impurity, so neither can stand alone as the answer. Sound has no relation to a filter in this sense. Hence, Filter is to Air.

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