Assertion [A]: Cactus does not perform photosynthesis.

Reason [R]: Spines are present in cactus.

A is true and R is false

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A is false and R is true

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Both A and R are true and R is a correct explanation for A

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Both A and R are true but R is not the correct explanation for A

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Solution

The correct option is B A is false and R is true

In cactus, the leaves are modified into spines which are needle-like structures. These spines help in the prevention of water loss and provides protection against the predators.

Stems in cactus are thick and fleshy which helps in storing the water. It contains the green colour pigment called chlorophyll which traps sunlight to perform photosynthesis.

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Assertion [A]: Cactus does not perform photosynthesis. Reason [R]: Spines are present in cactus.

Assertion [A]: Cactus does not perform photosynthesis.

Reason [R]: Spines are present in cactus.