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To solve this problem, we need to identify which of the given propositions is a tautology, i.e., which one is always true regardless of the truth values of the individual propositions.

Let's go through each option:

**A. \( q \lor p \lor \neg q \):**
- This is a disjunction of \( q \), \( p \), and \( \neg q \).
- Simplification: \( q \lor \neg q \) is always true because either \( q \) is true or \( \neg q \) is true.
- So, this reduces to \( \text{True} \lor p \), which is always true regardless of \( p \).
- Hence, **A is a tautology**.

**B. \( q \lor p \to p \land q \):**
- This is a conditional statement, which is equivalent to \( \neg(q \lor p) \lor (p \land q) \).
- This does not always hold true, depending on the values of \( p \) and \( q \). Hence, **B is not a tautology**.

**C. \( p \to \neg p \):**
- This is a conditional statement that says if \( p \) is true, then \( \neg p \) must be true.
- This is not always true because if \( p \) is true, \( \neg p \) is false.
- Hence, **C is not a tautology**.

**D. \( p \land (q \lor r) \):**
- This is a conjunction, which requires both parts to be true for the entire statement to be true.
- This is not always true because it depends on the values of \( p \), \( q \), and \( r \).
- Hence, **D is not a tautology**.

### Conclusion:
The answer is **A. \( q \lor p \lor \neg q \)**, which is a tautology.

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Would you like a deeper breakdown of any of the propositions or further details? 

Here are 5 related questions to consider:
1. What is the definition of a tautology in logic?
2. How can we prove a proposition is a tautology using truth tables?
3. Can you identify a contradiction in propositional logic?
4. How does the distributive property apply to logical operations?
5. What is the difference between tautology and logical equivalence?

**Tip:** A tautology in propositional logic is a formula that is true in every possible interpretation, no matter the truth values of the individual components.

Which one of these is a Tautology? A. q ∨ p ∨ ¬q, B. q ∨ p → p ∧ q, C. p → ¬p, D. p ∧ (q ∨ r)

Learn how to identify a tautology from a set of logical statements. This problem covers key concepts in propositional logic, including logical operations, tautologies, and logical equivalence. Suitable for high school students in Grades 10-12.

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