at the time of maturity you cannot claim the enite amount meaning thereby you have to commute say 60% or 70% of your 100% pension rest you have to buy annuity meaning thereby rest you will get only periodical monthly payments and I think the commuted pension you receive on maturity would be fully exempt just check with other experts too in this regard
I Know you are going for LIC Product even then please do evaluvate with other pension products but I have given a general note if you know any good financial planner please take their advises about the return