a. 7th to 9th day from the first day of menstrual cycle
b. 9th to 11th day from the first day of menstrual cycle
c. 13th to 15th day from the first day of menstrual cycle
d. 19th to 11th day from the first day of menstrual cycle
c.
As chances of fertilisation are very high from day 10 to 17 of the menstrual cycle, this period is called the fertile period.
