Vaginal sphincter is formed by all except -: (A) Internal urethral sphincter, (B) External urethral sphincter, (C) Pubovaginalis, (D) Bulbospongiosus
Answer is A. Urogenital sphincters in Females
-        Vaginal sphincters

Bulbospongiosus
Sphincter urethrovaginalis
External urethral sphincter
Pubovaginalis

-        Urinary sphincters

Compressor urethrae
External urethral sphincter
Sphincter urethrovaginalis
Pubourethralis