This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
MMR is expressed in : 
Select and explain. 
A. Per 1000 live bih, B. Per 10000 live bih, C. Per 1 lakh live bih, D. Per 10 lakh live bih
C: Per 1 lakh live bih
Answer: C: Per 1 lakh live bih 
Explanation: Maternal moality ratio is the number of maternal deaths per 1,00,000 live bihs. This is a ratio and not a rate because the numerator may include cases which are not included in the denominator. This ratio reflects the level of obstetric risk associated with pregnancy TEXTBOOK OF OBSTETRICS.,SHEILA BALAKRISHNAN,pg no:594,2nd edition