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B
Subsidiary cell
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C
Stoma
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D
None of the above
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Solution
The correct option is A Guard cells The cell surrounding the stomata is known as guard cells. They are two highly specialized cells. They are dumbbell shaped in grasses and Kidney-shaped in dicotyledons. They have nucleus, chloroplasts, starch grains, mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes. They regulate the rate of transpiration by opening and closing the stomata.