Karnataka tops as the most innovative state in the country for the second time in offering a conducive environment for innovation and performance parameters, according to NITI Aayogs India Innovation Index 2020 rankings. The index is based on innovation, enablers, human capital, investment, knowledge workers, business environment, safety and legal environment, performance, knowledge output, and knowledge diffusion, state s Industries department said in a press release. The rankings, released by the federal policy think-tank on Wednesday, show that Karnataka had retained its position from last year when they were first published, the release said. Maharashtra is ranked second while Tamil Nadu is in third position, it said.