Which race do Indo-Aryan belong to?

"Race" is such a flexible term. Some people think of there being three races (African, Asian, European) other four or five, still others as many as they need, ("Jewish race," "Irish race," etc.) Aryans or "Indo-European" were a huge collection of peoples distinquished by speaking languages with a common parent, although that parent itself has long since mutated by the time anybody thought of the term. As it suggests, there are both European and Asian (Indian) components though not quite everybody in Europe is Indo-European, nor is everybody in India. There are even other Asian members now known only through the scripts they left, known as Tocharian Linear.