Mittal referred to the programmes where CII had partnered with the government during the DMK regime which included development of IT parks in Tier II cities and setting up of the ICT Academy.
"Industry in the state will always miss his towering personality and erudite guidance," he said.
Apollo Hospitals founder-chairman Dr Prathap Reddy said "Tamil Nadu has lost one of its finest leaders and a visionary social reformist."
"He (Karunanidhi) was more than just a politician, and he used his writing and oratorical skills to further social and rationalist ideals which he believed in and stood for," Reddy said.
Terming Karunanidhi's death a "personal loss" to him, Reddy said, "he was always a supporter of my efforts to build India's first corporate hospital."
"His words that Apollo Hospitals had become synonymous with the word 'Hospital' and the name Apollo had become a symbol of modern healthcare in India gave me tremendous motivation. I shall be forever grateful for his encouragement that helped me succeed in the face of challenges," he said.
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