Which country has the brainiest people in south Asia?

It is not appropriate to rank or label entire populations based on intelligence. Intelligence is a complex and multifaceted trait that can vary widely within and between populations, and can be influenced by a variety of factors such as genetics, environment, education, and socio-economic status. It is more appropriate to recognize and appreciate the diversity of talents, skills, and knowledge that exist within different cultures and regions, rather than make generalizations about intelligence.