Terrestrial radiation is maximum in -: (A) Karnataka, (B) Orissa, (C) West bengal, (D) Kerala
Answer is D. Park's textbook of preventive and social medicine 23rd edition. *Terrestrial radiation: Radioactive elements such as thorium, uranium radium and an isotope of potassium are present in man's environment eg: soil, rocks, buildings. Areas exist eg: kerala in india where there are rock formations containing uranium.