This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Pressure of normal uterine contractions between 190-300 unit. Which unit is being referred to here? 
Select and explain. 
A. Montevideo units, B. mmHg, C. cm of water, D. Joules/kg
A: Montevideo units
Answer: A: Montevideo units 
Explanation: Montevideo units are used to define uterine activity. this is not very popular.TEXTBOOK OF OBSTETRICS, SHEILA BALAKRISHNAN,2nd edition, pg no:356