Which of the following hormones is produced in the ovaries?

The hormone that is produced in the ovaries is estrogen. Estrogen plays a crucial role in the development and regulation of the female reproductive system and secondary sexual characteristics. It is primarily responsible for the development of eggs (ova) in the ovaries and regulates the menstrual cycle and reproductive tissues.

Other hormones mentioned, such as vasopressin, prolactin, and oxytocin, are produced in different parts of the body. Vasopressin, also known as antidiuretic hormone (ADH), is produced in the hypothalamus and released by the posterior pituitary gland. Prolactin is produced by the anterior pituitary gland and is involved in breastfeeding and milk production. Oxytocin, also produced in the hypothalamus and released from the posterior pituitary, plays a significant role in childbirth and lactation.