<prompt> To achieve a Net Reproduction Rate NRR of be 1 couple protection rate should be:50605575  <response>: Ans. b. 60Ref: Parks Text book of Preventive and Social Medicine, 24th Ed; Page No-527NET REPRODUCTION RATE NRRNRR is demographic indicator.It is defined as the number of daughters a newborn girl will bear during her life time assuming fixed age specific fertility and mortality rates.COUPLE PROTECTION RATE CPRIt is an indicator of prevalence of contraceptive practice in a community.CPR is percent of eligible couples ECs protected against one or the other approved method of family planning, viz. Condoms, OCPs, IUDs, sterilization.NRR1 can be achieved if CPR60CPR India: 47.12106Goal for CPR in RCH-II 2004-09: 65Goal by 2020 FP vision: 63.7CPR x100 