5.LOWER PART OF VAGINA DEVELOPS FROM

A.FUSED MULLERIAN DUCT
B.FUSED WOLFFIAN DUCT
C.UROGENITAL SINUS
D.GENITAL TUBERCLE

ANS:UROGENITAL SINUS

In females, the genital tubercle becomes the clitoris; the genital swellings, the labia majora; and the urethral folds, the labia minora.

The urethral groove and the distal (phallic part of the) definitive urogenital sinus becomes the vestibule (vaginal introitus). The proximal (pelvic part of the) definitive urogenital sinus contributes to formation of the distal urethra and lower vagina.