Which of the following is the likely cause of the development of low blood calcium is an individual who recently had his thyroid removed?

1: The parathyroid glands were damaged during the surgery

2: Postsurgery stress response can resulting a decreased adrenal gland function

3: Removal of the thyroid gland has resulted in increased bone resorption of calcium

4: he pituitory gland is decreasing it is secration of thyroid stimulating hormone