LIC’s Annuity payable for remainder of life option has 50% spouse benefit?

For New Jeevan Suraksha-I pension plan, there are 5 options for Maturity Benefit from this page,
http://www.licindia.in/pension_plans_004_benefits.htm

(i) annuity payable for remainder of life.
(ii) annuity payable for life with guarenteed period of 5,10,15 or 20 yrs.
(iii) Joint life and last survivor annuity to the annuitant and his/her spouse….
….

If I choose first option (annuity payable for remainder of life), will my spouse get 50% of pension on my death?
And choosing any of the 5 options returns same amount of pension?