Maximum Guranteed Returns on Life Insurance Policy (LIC India)?

I would like to know out of the several different types of policy , LIC of India is offering, which policy has the best guranteed returns . Considering that the insured will be 32 years of age and nominee will be child. (15 - 25 years premium horizon) Normally I would like to keep investment and insurance isolated but this is for the purpose of child future planning and hence want to go for the policy having maximum guranteen returns. I have been suggested (Jeevan Saral) can any body beat this recommendation. Requesting answers with from insurance think tanks and experienced guys . Thanks for ur time !!