...What this means is Google finds in it's database that what did people really search for (caste of Abhinandan Vardhaman) previously when this string (Abhinandan Vardhaman) was typed in the search bar before and it shows suggestions based on actual searches made in the past.
...So, what this really means is that people in our country or our proximity are searching for this particular question more than anything else about Abhinandan Vardhaman, and this is what makes Google think that this must be the most relevant question about this person, and hence it gives you this suggestion...
