Select the correct match.

Options

A. Cell was first discovered - 1839
B. The term 'protoplasm' was coined - 1665
C. The nucleus was discovered - 1831
D. Cell theory was proposed - 1674

Explanation

To solve the question "Select the correct match," we need to evaluate each of the provided options regarding their historical accuracy. Let's analyze each option step by step.

### Step 1: Analyze the first option
- **Statement**: "Cell was first discovered in 1839."
- **Evaluation**: The cell was actually first discovered by Robert Hooke in 1665, not in 1839. Therefore, this option is incorrect.

### Step 2: Analyze the second option
- **Statement**: "The term protoplasm was coined in 1665."
- **Evaluation**: The term "protoplasm" was actually coined in 1835. Thus, this option is also incorrect.

### Step 3: Analyze the third option
- **Statement**: "Nucleus was discovered in 1831."
- **Evaluation**: This statement is correct. The nucleus was discovered by Robert Brown in 1831 while studying the cells of orchid plants. Therefore, this option is correct.

### Step 4: Analyze the fourth option
- **Statement**: "Cell theory was proposed in 1674."
- **Evaluation**: The cell theory was proposed in 1839 by Schleiden and Schwann. Therefore, this option is incorrect.

### Conclusion
After analyzing all the options, we conclude that the third option, which states that "Nucleus was discovered in 1831," is the correct match.

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