<prompt> Demographic Gap attains its maximum limit inEarly stage ILate stage IILate stage IIIEarly stage IV  <response>: Demographic cycle Demographic cycle is closely related to : Socio-economic progress of a country There are 5 stages Phases of demographic cycle through which a nation passes Stages Phases CBR CDR Stage I High Stationary High high Stage II Early expanding High Stas declining Stage III Late expanding Stas declining Continue declining Stage IV Low Stationary Low Low Stage V Declining CDR CBR Demographic cycle is based on : Demographic gap DG Crude Bih Rate CBR - Crude death rate DG stas increasing : Early stage II Early expanding phase DG is Maximum : Late stage II Early expanding phase DG stas declining : Early stage III Late expanding PHASE DG is negative : Stage V Declining phase DG is Narrow : Stage I high Stationary ; Stage IV Low Stationary Ref: Foundations of community Medicine, GM Dhaarb I Robbani, 1st edition Park 25th edition Pgno : 530 