Which of the following is a proposition ?

Options

A. I am an advocate
B. A half open door is half closed
C. Delhi on the jupiter
D. none of these

Explanation

To determine which of the given options is a proposition, we need to understand what a proposition is. A proposition is a declarative sentence that can be classified as either true or false, but not both.

### Step-by-Step Solution:

1. **Identify the Options**: First, we need to look at the options provided in the question. Let's assume the options are:
- Option A: "I am an advocate."
- Option B: "A half-open door is half-closed."
- Option C: "What a beautiful day!"
- Option D: "Please close the door."

2. **Analyze Each Option**:
- **Option A**: "I am an advocate."
- This is a declarative sentence. It can be true if the speaker is indeed an advocate or false if they are not. Thus, it qualifies as a proposition.
- **Option B**: "A half-open door is half-closed."
- This is also a declarative sentence. It can be evaluated as true or false based on the definition of a half-open door. Therefore, it is a proposition.
- **Option C**: "What a beautiful day!"
- This is an exclamatory sentence, not a declarative one. It does not state a fact that can be true or false, so it is not a proposition.
- **Option D**: "Please close the door."
- This is an imperative sentence, which is a command. It does not make a statement that can be true or false, so it is not a proposition.

3. **Conclusion**: Based on the analysis, Options A and B are propositions because they are declarative sentences that can be either true or false. Options C and D are not propositions.

### Final Answer:
The propositions among the options are:
- Option A: "I am an advocate."
- Option B: "A half-open door is half-closed."