<prompt> Optimum unit of preventive, curative and promotive health care isAppropriatenessAvailabilityAdequacyComprehensiveness  <response>: Health care characteristics include 1 Appropriateness - relevance 2 Comprehensiveness - optimum mix of preventive, curative and promotional services. 3 adequacy 4 availability 5 accessibility 6 affordability 7 feasibility Ref: Park;s Textbook of Preventive and Social Medicine,24th edition, Page no. 33 