The correct option is A Liver
One of the functions of the liver is to remove the poisonous substances from blood flowed by their detoxification. Kupffer cells are the large fixed phagocytic cells that are attached to the lining of the hepatic sinusoids in the liver and serve to remove pathogens and debris that enter through the hepatic portal vein at the small intestine. Kupffer cells constitute 80-90% of the tissue macrophages present in the body. Thus, the correct answer is option A.