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Question

Hill reaction occurs in

A
high altitude plants
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B
absence of water
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C
total darkness
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D
presence of ferricyanide
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Solution

The correct option is D presence of ferricyanide
Hill reaction
The Hill reaction is a phenomena in which the hydrogen ion of water reduces a final electron acceptor in presence of light. The physiological electron acceptor in living system is NADP+ that gets reduced to NADPH.
Robin Hill, in his experiment to show this, had used non-physiological reagents known as ‘Hill reagents’ such as ferricyanide. Ferricyanide gets reduced by the hydrogen produced from the photolysis of water.

Final answer:
(d) presence of ferricyanide

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