Which of the following is a trace mineral?Question 47Answera.potassiumb.calciumc.sulfurd.iron

Step 1: Break Down the Problem

We need to identify which of the given options is classified as a trace mineral. Trace minerals are essential nutrients that the body requires in small amounts.

Step 2: Relevant Concepts

1. Trace Minerals: These are minerals that are needed by the body in very small amounts, generally less than 100 mg per day.
2. Common Trace Minerals: Some common trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.

Step 3: Analysis and Detail

Let’s analyze each option:

1. Potassium: This is not a trace mineral; it is classified as a macro mineral.
2. Calcium: Like potassium, calcium is also a macro mineral and is vital for bone health.
3. Sulfur: Sulfur is considered a macromineral rather than a trace mineral.
4. Iron: Iron is classified as a trace mineral, necessary for transporting oxygen in the blood.

Step 4: Verify and Summarize

After analyzing all the options, it is clear that iron is the only one that fits the definition of a trace mineral. Potassium, calcium, and sulfur are all required in larger amounts.

Final Answer

The trace mineral from the options provided is d. iron.