Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?

Answer: B. BISPHENOL A (BPA) is a key component in the manufacture of POLYCARBONATE plastics. BISPHENOL A (BPA) is an industrial chemical used since the 1960s as a MONOMER in the production of: - POLYCARBONATE (PC) PLASTICS — clear, hard, shatter-resistant plastic used in water bottles, baby bottles, eyeglass lenses, CDs/DVDs, medical devices, sports equipment. - EPOXY RESINS — internal coatings of food and beverage cans, dental sealants, thermal paper (receipts). BPA can leach from polycarbonate containers, especially under heat (microwaving), acidic/basic conditions, or with prolonged use, contaminating food and drink. HEALTH CONCERNS make BPA controversial: - BPA is an ENDOCRINE DISRUPTOR — it mimics estrogen by binding to estrogen receptors. - Associated risks: developmental effects on the brain and prostate of foetuses and infants, behavioural effects, cardiovascular effects, diabetes, certain cancers. - The FDA, EFSA, and Health Canada have BANNED BPA in baby bottles and infant formula packaging. The EU's tolerable daily intake was sharply lowered in 2023. - Manufacturers offer BPA-FREE plastics using alternatives (BPS, BPF) — though these too have raised similar endocrine-disruptor concerns. Why other options are WRONG: (A) LOW-DENSITY POLYETHYLENE (LDPE) — made from ethylene monomer (CH2=CH2), no BPA. Used in plastic bags, films. (C) POLYETHYLENE TEREPHTHALATE (PET) — made from ethylene glycol + terephthalic acid, NOT BPA. Used in soft-drink bottles. (PET is generally regarded as BPA-free.) (D) POLYVINYL CHLORIDE (PVC) — made from vinyl chloride monomer, NOT BPA. Used in pipes, flooring. (PVC has its own concerns — phthalate plasticisers.) Source: NCERT Class 12 Chemistry 'Polymers' / FDA/EFSA BPA risk assessments / CPCB plastic management documents.