This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Which of the following tests can differentiate MRKH from testicular feminizing syndrome 
Select and explain. 
A. 3D USG, B. MRI, C. Karyotyping, D. Serum testosterone levels.
C: Karyotyping
Answer: C: Karyotyping 
Explanation: Karyotyping is best to differentiate between MRKH and testicular feminization syndrome.