This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis of Pregnancy, Subject name: Gynaecology & Obstetrics
According to Naegele's rule, calculate EDD of a patient with LMP 9/01/2017 
Select and explain. 
A. 16/10/2017, B. 16/09/2017, C. 16/11/2017, D. 9/10/2017
A: 16/10/2017
Answer: A: 16/10/2017 
Explanation: Naegel's rule = 9 months + 7 days (add to the first day of last menstrual period) - LMP = 9/01/2017- Apply naegel's rule and add 9 months + 7 days =16/10/2017 (add 7 to date and 9 to month)