In angiospermic plants, before formation of microspore the sporogenous

In angiospermic plants, before formation of microspore the sporogenous tissue undergoes cell division.
(a) Name the type of cell division.
(b) What would be the ploidy of the cells of tetrad?

(a) The type of cell division involved is meiosis or meiotic division.
(b) The cells of the tetrad would be haploid in nature.