As per SBI Life Product Brochure - http://www.sbilife.co.in/sbilife/doc...money_back.pdf
Vested Bonus is not Guaranteed.
If we go by your example - Premium Rs 30000/- per year. Option 2 / 15 years
Guaranteed Survival Benefit payable - After every 3 years on the term following will be paid -
3 years - 10% of Sum Insured (Rs. 30000)
6 years - 15% of Sum Insured (Rs. 45000)
9 years - 20% of Sum Insured (Rs. 60000)
12 years - 25% of Sum Insured (Rs. 75000)
15 yrears - 45% of Sum Insured ( Rs. 135000)

I could not get the word surrender in the Product Brochure.