This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - normal, abnormal, malposition, malpresentation and their management, Subject name: Gynaecology & Obstetrics
A 34 weeks pregnant woman with complaints of leaking vaginal discharge. What examination will confirm premature rupture of membranes in this patient? 
Select and explain. 
A. Digital examination, B. USG exam, C. Speculum exam, D. Urine exam
C: Speculum exam
Answer: C: Speculum exam 
Explanation: On per speculum examination - a gush of fluid is an obvious diagnostic test for PROM. If the leak is small or not significant, it may not be possible to visualise it. Some investigations which are known to help are - Nitrazine paper test Fern Test Indigocarmine dye test