In the two lists given below, in List I specific categories of causes of mental retardation are given while List II describes the causes. Match the two lists and choose the correct answer from the code given below. List I (Category) List II(Causes)(a) Post-natal causes (i) Chromosomal abnormality (b) Pre-natal causes(ii) Anoxia and Asphyxia(c) Perinatal causes(iii) Malnutrition and poor medical care (iv) Psychiatric disorders

MENTAL RETARDATIONBelow-average intelligence or mental ability and a lack of skills necessary for day-to-day living.Mental retardation is the substantial limitations in present functioning.It starts before age 18.Idividual have subaverage intellectual functioning, existing concurrently with related limitations in two or more of the following applicable adaptive skill areas: communication, self-care.The intellectual function can be measured with a test.The main symptom is difficulty thinking and understanding.Life skills that can be impacted upon include certain conceptual, social, and practical skills.Special education and behavioral therapy can help a person live to his or her fullest. People with intellectual disabilities can and do learn new skills, but they learn them more slowly. Post-natal The postpartum or postnatal period begins immediately after childbirth.As the mother's body, including hormone levels and uterus size, returns to a non-pregnant state.The terms puerperium, puerperal period, or immediate postpartum period are commonly used to refer to the first SIX weeks following childbirth.Basic care for all newborns should include promoting and supporting early and exclusive breastfeeding, keeping the baby warm, increasing handwashing and providing hygienic umbilical cord and skincare, identifying conditions requiring additional care and counseling on when to take a newborn to a health facilityPostnatal cause of mental retardation are:severe malnutrition or other dietary issuessevere cases of early childhood illness, such as whooping cough, MEASLES, or meningitisbrain injuryPre-natalThe process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.Prenatal care, also known as antenatal care, is a type of preventive healthcare.It is provided in the form of medical CHECKUPS, consisting of recommendations on managing a healthy lifestyle.Prenatal care is when you get checkups from a doctor, nurse, or midwife throughout your pregnancy.It helps keep you and your future baby healthy.Pre-natal cause of mental retardationinherited disorders, such as phenylketonuria (PKU) or Tay-Sachs diseasechromosome abnormalities, such as Down syndromePerinatalPertaining to the period immediately before and after birth.The perinatal period is defined in diverse ways.Depending on the definition, it starts at the 20th to 28th week of gestation and ends 1 to 4 weeks after birth.Quality skilled care during pregnancy and childbirth is key for the health of the baby and the mother.Prinatal cause of mental retardationIn the perinatal period, the predominant cause is birth asphyxia.It is TECHNICALLY referred to as the critically impaired intrapartum gas exchange.Hence, the correct match is (a) - (iii), (b) - (i), (c) - (ii).List I (Category) List II(Causes) Post-natal causes Malnutrition and poor medical care Prenatal causesChromosomal abnormality Perinatal causesAnoxia and Asphyxia