Government is advertising various health related and population control related programmes through hoardings. One of these is the use of 'condoms' as barriers and for safe sex. Give reasons.

Which among these are steps token by the government to check population growth rate: (I) Motivating smaller famiUes through advertisements in the media as well as through posters or bills, etc. to promote the use of various birth control methods (contraceptive methods). (II) Giving incentives to couples with smaller families. (III) The marriageable age of the female has been increased to 18 years and that of males to 21 years. (IV)Provision of jobs for families having just one child.