MICROANATOMY

Detailed explanation-1: -Graves’ Disease is the right answer. An overactive thyroid can be caused by a variety of factors. Graves’ disease, an autoimmune illness of thyroid tissue, is a common cause.

Detailed explanation-2: -The most common cause of hypothyroidism is an autoimmune disease called Hashimoto’s disease. Autoimmune diseases happen when the immune system makes antibodies that attack healthy tissues. Sometimes that process involves the thyroid gland and affects its ability to make hormones.