Correct option is A
- The sentence must begin by establishing the success of a specific model; part Q provides the key link: “was such a success that …”.
- Part S logically follows because it identifies Rolls-Royce and the model “the Phantom II” and sets up the business context.
- Part R then states the main action taken: Rolls-Royce purchased Bentley Motors to prevent competition.
- Part P completes the remaining descriptive detail, keeping the sentence meaningful and grammatically connected.
- PQSR begins abruptly with an incomplete phrase.
- SRQP introduces Rolls-Royce before explaining the success link properly.
- RSQP starts with an action without setting context.