Gynaecology & Obstetrics The investigation of choice to differentiate Mullerian agenesis from testicular feminization syndrome in a case of primary amenorrhea is: A USG B Laparoscopy C Karyotype D Hormonal assays 💡 Explanation The investigation of choice to differentiate Mullerian agenesis from testicular feminization syndrome in a case of primary amenorrhea is: ✓ Correct Answer: C. Karyotype