Hysteroscopy can be used to visualize -: (A) Misplaced IUCD, (B) Submucosal fibroid, (C) Uterine synechiae, (D) All the above
Answer is D. Hysteroscopy is the endoscopic technique of visualizing the interior of uterus directly.
It is both diagnostic and therapeutic. A hysteroscope can visualize the interior of the uterus so. it can diagnose
Any congenital malformation of the uterus and can also help in differencing between a bicornuate uterus from a septate uterus.
Any uterine synechiae (as in Ashermann syndrome).  Misplaced IUCD.  Submucous fibroid.
A hysteroscope can visualize the cornua so. it can diagnose  Any corneal pathology:- Hysteroscope can directly visualize the endometrium so. it can diagnose  
Endometrial lesions like-endometrial polyp, endometrial hyperplasia, endometrial cancer, endometrial T.B. 

Pregnancy related conditions like :

Molar issue or products of conception. Also, know o Most common distension media used in diagnostic hysteroscopy → CO2
Most common distension media used in therapeutic → Glycine hysteroscopy