My cousin, Ayush who is 4 years and 6 months old.
He is having good physique and no health related problems, but he is not able to speak or communicate in a way. He seems to listen and understand what we say.
He is under-treatment at Patna, India, since last year, but there have been no positive results so far. His condition is stagnant. The doctor there says, It is something brain-related problem that he's going through.

Kindly advice us on what to do next.
Thank You
Akhil Vatsa
India