The assertion states that human diet should include the mineral potassium. The reason provided is that potassium stimulates the thyroid gland to synthesize the hormone thyroxine using iodine.
Option 1 states that both the assertion and the reason are true, and that the reason is the correct explanation for the assertion. This option aligns with the given information. Potassium is indeed an essential mineral for human health, and it plays a role in various bodily functions, including muscle and nerve activity, and heart function. Additionally, the thyroid gland does produce thyroxine, a hormone that regulates metabolism, and it does require iodine for its synthesis. Therefore, potassium indirectly stimulates the thyroid gland to synthesize thyroxine by using iodine.
Option 2 states that both the assertion and the reason are true, but the reason is not a correct explanation for the assertion. However, based on the information provided, this option does not seem to be the most appropriate choice, as the reason does provide a valid explanation for the assertion.
Option 3 states that the assertion is true, but the reason is false. There is no information provided to support this option.
Option 4 states that the assertion is false, but the reason is true. Again, based on the given information, there is