There are many excellent co-educational boarding schools in India. It can be difficult to determine which one is the best, as the best school for you will depend on your specific needs and preferences. Some of the top Best co-educational boarding schools in India include The Delhi public School in Haryana, Mayo College in Ajmer, Welham Boys' School in Dehradun, and The Bishop's School in Pune. These schools are known for their high-quality education, impressive facilities, and holistic learning environment. It's important to do your research and visit the schools in person to determine which one is the best fit for you.