The development of microsporangia of an angiosperm is said to be eusporangiate because
a single cell - leptosporangiate
a single - cell eusporangiate
group of hypodermal cells - leptosporangiate
group of hypodermal cells - eusporangiate
The microsporangia are developed in a way that is eusporangiate as sporangia are formed from several epidermal cells or archesporial cells. It does not form a single cell. As a result, the development of microsporangia in anther is from a group of hypodermal cells and is eusporangiate. Hence, the correct option is (d)