<prompt> The following is true about term New Families -It is variant of the 3-generation familyIt is applied to all nuclear families of less then 10 years durationIt is variant of the joint familyIt is applied to all nuclear families of less then 2 years duration  <response>: - all nuclear families of less then 10 years duration is termed as new families. - the concept is impoant in view of studies relating to family planning. Reference : Parks textbook of preventive and social medicine, 23rd edition, pg no:684 p 