Answer: Option A) Parathyroid glands
Explanation:
The Parathyroid gland located in the neck region helps in the secretion of an hormone called Parathormone.
This hormone helps to raise the levels of calcium ions in the body, by preventing the loss of calcium ions through urine, and also preventing excess deposit of calcium ions in the bone, thus regulating bone density.
I had to draw a sodium atom so if i remember correctly there are 11 electrons, 11 protons, and 12 neutrons. Cx Hope I helped.
Number 3 and 4 are the correct answers hope this helped
