Microsporangium is generally surrounded by 4 wall layers. Which of the following 3 wall layers p...

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Microsporangium is generally surrounded by 4 wall layers. Which of the following 3 wall layers perform the function of protection and help in the dehiscence of anther to release the pollen?
(a) Epidermis, tapetum, endothecium
(b) Epidermis, aril, endothecium
(c) Epidermis, endodermis, mesocarp
(d) Epidermis, middle layer and endothecium
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