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Question

Richmond-Lang effect is shown by

A
Auxins
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B
Sugars
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C
Kinetin
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D
Gibberellins
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Solution

The correct option is C Kinetin
Kinetins are a type of phytohormone (cytokinin). One of the important physiological effect of cytokinins is that they delay senescence. This delay in senescence of mature plant parts is known as Richmond Lang effect.
Thus, the correct answer is option C.

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