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B
ATP and ADP
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C
Auxins and hormones
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D
Carbolwdrates and lipids
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Solution
The correct option is A pH gradient and electro potential gradient In proton pumps, positively charged protons create proton gradient across the membrane,proton gradient have 2 component i.e chemical and electrical.The chemical copmponent is proton concentration or pH gradient electric component is electric potential across the membrane ,resultingh net increase of positive charges on cytosolic side.