In females, both LH (luteinizing hormone) and FSH (follicle-stimulating hormone) are released from the pituitary gland. However, since you can only choose one response, the answer would be LH or FSH depending on the context of your question.
If you are looking for the hormone primarily involved in triggering ovulation, then LH is the correct answer.
If you are looking at the hormone that stimulates the growth of ovarian follicles, then FSH would be correct.
Make sure to clarify the context of your question!