Which state government has started the first caste socio economic survey?

In which of the following countries was the One Health Summit 2026 organized to promote health?

 What rank has India been assigned globally in terms of patent filings for the fiscal year 2025-26? 

Biju Patnaik was the former Chief Minister of which state, whose 29th death anniversary was observed on April 17, 2026?

Which death anniversary of the renowned revolutionary leader Mangal Pandey was observed on April 8, 2026?