Q.4 R2D2 is a robot. R2D2 can repair aeroplanes. No other robot can repair aeroplanes.
Which of the following can be logically inferred from the above statements?
(A) R2D2 is a robot which can only repair aeroplanes.
(B) R2D2 is the only robot which can repair aeroplanes.
(C) R2D2 is a robot which can repair only aeroplanes.
(D) Only R2D2 is a robot.

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This classic R2D2 logic puzzle tests your ability to draw precise inferences from given statements. Popular in competitive exams like banking, SSC, and UPSC reasoning sections, it hinges on understanding exclusivity in logical statements. Let’s break it down step by step, reveal the R2D2 logic puzzle answer, and analyze every option.

The Given Statements

Consider these three premises:

1. R2D2 is a robot.

2. R2D2 can repair aeroplanes.

3. No other robot can repair aeroplanes.

These form a syllogism where the third statement introduces exclusivity: only R2D2 (among robots) has the ability to repair aeroplanes. No additional assumptions about other abilities or robots are provided.

Correct Answer: Option (B)

R2D2 is the only robot which can repair aeroplanes.

This directly follows from the statements. R2D2 is a robot that repairs aeroplanes (statements 1 and 2), and no other robot can do so (statement 3). Thus, R2D2 holds the unique position among robots for this skill. This is a valid logical inference—no more, no less.

Detailed Explanation of All Options

To master the R2D2 logic puzzle answer, evaluate each choice against the premises. Only inferences that must be true qualify.

• Option (A): R2D2 is a robot which can only repair aeroplanes.
  Incorrect. This implies R2D2 exclusively repairs aeroplanes and nothing else. The statements say nothing about R2D2’s other capabilities—it could repair cars or cook droids. This adds an unstated restriction.

• Option (B): R2D2 is the only robot which can repair aeroplanes.
  Correct, as explained above. Statement 3 explicitly rules out all other robots, making R2D2 uniquely qualified.

• Option (C): R2D2 is a robot which can repair only aeroplanes.
  Incorrect. Similar to (A), this limits R2D2 to aeroplanes alone. The premises don’t restrict R2D2’s skills to just this one task.

• Option (D): Only R2D2 is a robot.
  Incorrect. Statement 3 mentions “no other robot,” implying other robots exist—they just can’t repair aeroplanes. This option overextends the exclusivity.

Why This Puzzle Matters for Exams

Logic puzzles like this appear in exams testing deductive reasoning. The key? Avoid injecting extra assumptions. Focus on what the statements guarantee. Practicing similar questions sharpens your edge—search for “syllogism only statements” for more.

For visual learners:

Mastering the R2D2 logic puzzle answer builds confidence in reasoning sections.