"Kallai Mattum" (Om Namo Narayan in Sanskrit) is a song from the Tamil film Dasavatharam starring Kamal Haasan, Asin Thottumkal and Mallika Sherawat, directed by K. S. Ravikumar.
The producer of the film asked the director, K. S. Ravi to be credited simply as Ravi in the film, to avoid confusion with another director K. S. Ravikumar.
He is presently the Managing Director and Chief Executive Officer of National Commodity and Derivatives Exchange Limited.
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He is a member on the Board of Directors of Bharat Forge Limited, Pune, Eveready Industries India Limited, Kolkata, National Collateral Management Services Ltd., The Federal Bank Ltd., NABARD Consultancy Services (P) Ltd.
P. H. Ravikumar (born 1951), Managing Director and the Chief Executive Officer of the National Commodity and Derivates Exchange Limited
He became assistant to directors Pandiyarajan ('Aan Pavam'), Vikraman ('Poove Unakkaga', 'Suryavamsam', 'Unnai Ninaithu' and 'Priyamana Thozhi') and K.S.Ravikumar.