Explanation:

- The Royal Gold Medal is a prestigious award by the Royal Institute of British Architects, recognizing significant contributions to international architecture.

- Balkrishna Doshi is a renowned Indian architect known for his pioneering work in low-cost housing and urban planning.

- Raj Rewal is another Indian architect, but he was not awarded the RIBA Royal Gold Medal in 2022.

- Mani Ratnam and P. C. Sreeram are both from the film industry, known as a director and cinematographer, respectively, not architects.

- Option 5 (“None of these”) is irrelevant since the correct answer is given.