I watched 'Zehrila Insaan (1974) for the first time tonight.  A Hindi remake of the 1972 Kannada movie 'Naagarahaavu', it was directed by Puttana Kanagal who also directed the Kannada version.  Although Rishi Kapoor has delivered a commendable performance, I don't think it quite measures up to the performance delivered by the Late Vishnuvardhan, in the Kannada version. Just as Amjad Khan ensured that nobody could ever reprise the role of Gabbar Singh in the iconic movie Sholay, Vishnuvardhan delivered a powerhouse performance in 'Naagarahaavu' which was also marked his celluloid debut in a leading role.  While 'Naagarahaavu' firmly established Vishnuvardhan as a lead actor and went on to become the first Kannada to enjoy a theatrical run which exceeded a hundred days, 'Zehrila Insaan' bombed at the box office.  To the Hindi version's credit however is the extremely popular and memorable song 'O Hansini' which was composed from scratch. Most of the movie, like its Kannada version, was shot in and around the hill city of Chitradurga in the state of Karnataka in India. Here's the 'O Hansini' song, the music score of which was composed by R.D. Burman and sung by the legendary Kishore Kumar.