Solution

The microsporangia in Cycas are borne in sori on the abaxial surface of the sporophyll. Each sorus contains 2 6 microsporangia. The number of microsporangia may be up to 700 in C.circinalis, 1000 in C. revoluta and 1150 in C.media. In between the sporangia are present uni or bi celled epidermal hair. The microsporangia are short-stalked, oval or elliptical structures. The development of the sporangium is of eusporangiate type. Each sporangium consists of a 5 6 layered wall. The outermost wall layer is called as exothecium whereas the innermost layer is the tapetum. The microsporangia are borne in sori on the abaxial surface of the sporophyll. Each sorus contains 2 6 microsporangia. The number of microsporangia may be up to 700 in C.circinalis, 1000 in C. revoluta and 1150 in C.media. In between the sporangia are present uni or bi celled epidermal hair. The microsporangia are short-stalked, oval or elliptical structures. The development of the sporangium is of eusporangiate type. Each sporangium consists of a 5 6 layered wall. The outer most wall layer is called as exothecium whereas the innermost layer is the tapetum.

Therefore, the correct answer is option B.