Regarding sexual differentiation of the fetus
OptionB: SRY Gene located on Y chromosome encodes Testis Determining Factor which leads to the development of male genital organs Option C&D: Development of external genitalia is similar in males and females till the 6th week of IUL(Indifferent stage)....later develops in the direction of hormones. REFERENCE: TEXTBOOK OF CLINICAL EMBRYOLOGY... VISHRAM SINGH SECOND EDITION..PAGE NO:277
General anatomy
Gonadal development begins at 5th week of intrauterine life
Y chromosome determines the differentiation of ovaries
Female external genitalia development is completed by 10 weeks
Male sexual differentiation occurs earlier than females
Gonadal development begins at 5th week of intrauterine life