This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
Using Naegele rule, calculate the due date if last menstrual date is july 5th? 
Select and explain. 
A. October 8th, B. April 8th, C. October 12th, D. April 12th
D: April 12th
Answer: D: April 12th 
Explanation: A quick estimate of a pregnancy due date based on menstrual data can be made as follows: add 7 days to the first day of the last period and subtract 3 months. For example, if the first day of the last menses was July 5, the due date is 07 minus 3 (months) with 05 plus 7 (days) = 04-12, or April 12 of the following year. This calculation has been termed as Naegele rule.Ref: Embryogenesis and Fetal Morphological Development