Given below are two statements:
Statement I: Parathyroid hormone along with thyrocalcitonin plays a significant role in carbohydrate metabolism.
Statement II: Parathyroid hormone acts on bones and stimulates the process of bone resorption.
In the light of the above statements, choose the correct answer from the options given below:

Correct option is D

The Correct answer is(d) Statement I is false but Statement II is true. 
Explanation: 
 Parathyroid hormone (PTH) and thyrocalcitonin (calcitonin) primarily regulate blood calcium and phosphate levels. They are the main hormones involved in calcium balance in the body.
 PTH helps increase blood calcium levels, while calcitonin helps decrease them.
 Neither PTH nor calcitonin plays a significant role in carbohydrate metabolism, which is primarily controlled by hormones like insulin and glucagon. Thus, Statement I is false.
 PTH acts on bones and stimulates the process of bone resorption (dissolution/demineralization), which releases calcium into the bloodstream. Thus, Statement II is true. 
Information Booster:
• PTH is a hypercalcemic hormone, meaning it increases blood calcium (Ca 2+) levels.
• Calcitonin is a hypocalcemic hormone, meaning it lowers blood calcium (Ca 2+) levels.
• The effects of PTH on bone can be either catabolic (bone-resorbing) with continuous high exposure or anabolic (bone-forming) with intermittent low doses.
• Thyroid hormones, not thyrocalcitonin, play an important role in regulating the basal metabolic rate and controlling the metabolism of carbohydrates, proteins, and fats.