Correct option is A
I. Some fathers are females.
II. All fathers are males.
III. Some fathers are mothers.

II. Some mothers are females.(Not Follows, The statements do not say anything about mothers being females specifically)
III. Some males are mothers. (Follows, Some fathers are mothers (Statement III),all fathers are males (Statement II), So some males are mothers (those fathers who are mothers).
Thus, correct option is (a).