Correct option is D
Statement I: Bio magnification occurs when the toxic burden of a large number of organisms at a higher trophic level is accumulated and concentrated in organisms at a lower trophic level. This statement is false. Biomagnification, or bioaccumulation, actually occurs in the opposite way – it is the process by which the concentration of toxins increases as you move up the trophic levels in a food chain. Toxins and pollutants are accumulated in higher concentrations in organisms at higher trophic levels, not lower.
Statement II: The effect of toxins is magnified in the environment through food webs. This statement is true. Biomagnification refers to the process where toxins become more concentrated in successive trophic levels of a food web. As a result, organisms at the top of the food chain generally suffer greater exposure to toxins and pollutants than those at lower levels.
Hence, The correct answer is (d) Statement I is false but Statement II is true.