How many mature eggs are typically produced by each ovary of a non-pregnant woman in a year?

The correct option is C 12
In the ovulatory phase during which the ovum complete its maturation process and ovulation occurs. Typically only one egg is released in each cycle. However, more than can be released, and if fertilized, can result in multiple fraternal births. The luteal phase lasts approximately 14 days from ovulation to the beginning of next menses. Hence eggs typically produce 12 ovaries in a year.

So the correct option is '12'.