Consider the following statements,
Sulphur occurs free in nature.
Living organism contain iron in haemoglobin.
Gold is found in the sediments in the ocean floor.
Seaweeds are important sources of iodine.
Which of these statements are true? Choose the correct option.

Options

A. I, II and III
B. II, III and IV
C. I, III and IV
D. All of the above

Answer

To determine which statements are true, let's analyze each statement one by one:

1. **Sulfur occurs free in nature.**
- This statement is **true**. Sulfur can be found in its elemental form in nature, particularly in volcanic areas and hot springs. It exists in various allotropic forms, such as rhombic and monoclinic sulfur.

2. **Living organisms contain iron in hemoglobin.**
- This statement is **true**. Hemoglobin is a protein in red blood cells that carries oxygen throughout the body, and it contains iron, which is essential for its function.

3. **Gold is found in the sediments in the ocean floor.**
- This statement is **true**. Gold can be found in various forms in nature, including in sediments on the ocean floor, where it can accumulate over time.

4. **Seaweeds are important sources of iodine.**
- This statement is **true**. Seaweeds, particularly brown seaweeds, are known to be rich in iodine, which is an essential nutrient for human health.

Now, since all four statements are true, we can conclude that the correct option is:

**All of the above statements are true.**

### Summary of the Correct Answer:
- **Correct Option:** All of the above (1, 2, 3, and 4 are true).