(a) A bond with zero interest rate but with highest liquidity value for which investors get other concessions like tax breaks

(b) A bond with zero coupon rates which is sold at a price lower than its face value and investors get face value price at maturity

(c) A special category of bonds used as 'express money' to finance immediate needs of the economy which carries zero interest but gives tax credits to investors in their income tax returns

(d) A kind of bond which is generally issued by governments in the times of financial crises to the high income group citizens which carry no interest but investors get tax concessions for investing in it

(a) Develop national strategies for the conservation and sustainable use of biological diversity

(b) Reduce the greenhouse gas emissions but places a heavier burden on developed countries

(c) Improve banking sector's ability to deal with financial and economic stress and improve risk management

(d) Transfer technology from developed countries to poor countries to enable them to replace the use of chlorofluorocarbons in refrigeration with harmless chemicals