<prompt> ICD - 10 chapter 1 describes ?Poisoning and consequencesDiseases of the nervous systemInfectious and parasitic diseasesPsychiatric diseases  <response>: Ans. is c i.e., Infectious and parasitic diseases The ICD-10 is arranged in 21 major chaptors.21 Chapters and their contentsChapter I includes Infectious and parasitic diseasesChapter II includes WeoplamsChapter III includes Diseases of blood immune systemChapter IV includes Endocrine, nutritional and metabolic disordersChapter V includes Mental behavioral disordersChapter VI includes Diseases of nervous systemChapter VII includes Diseases of eyeChapter VIII includes Diseases of ear and mastoidChapter IX includes Diseases of CVSChapter X includes Diseases of respiratory systemChapter XI includes Diseases of digestive systemChapter XII includes Diseases of skin subcutaneous tissueChapter XIII includes Diseases of musculoskeletal systemChapter XIV includes Diseases of genitourinary systemChapter XV includes Pregnancy childbih and perperiumChapter XVI includes Conditions of perinatal periodChapter XVII includes Congenital malformation and genetic disordersChapter XVIII includes Clinical and laboratory findings not included elsewhereChapter XIX includes Injury, poisoning and other consequences of external causes.Chapter XX includes External causes of morbidity and moilityChapter XXI 21 includes Factors influencing health status and contact with health services 