$R2D2$ 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?
- $R2D2$ is a robot which can only repair aeroplanes.
- $R2D2$ is the only robot which can repair aeroplanes.
- $R2D2$ is a robot which can repair only aeroplanes.
- Only $R2D2$ is a robot.