Correct option is A
Statement I is true as exposure to mercury can indeed occur through the food chain, particularly by consuming fish and shellfish contaminated with methylmercury, and in workplaces that use mercury or mercury compounds. Statement II is also true; poisoning by inorganic mercury, especially mercury vapors, can severely damage the central nervous system, alongside other health effects such as damage to the kidneys and immune system. Mercury's neurotoxic effects are well-documented, making both statements accurate.