Ageon Religare & Kotak Life Insurance has the most economical premium.
Religare Premium is Rs 23 per day and Kotak Premium is only Rs 24 per day( Rs 8764) for a 35 year old non smoker who takes the policy for 25 years.

*Kotak rate is for Non Smoker.
Money Today sourced the information from Company websites
Figures are indicative premium in rupees for a year assured of Rs 25 lakh inclusive of service tax. Assuming that the insurance policy is take till the age of 60.
All rates are on date 11 Dec 2008