Assertion [A]: Human beings follow heterotrophic mode of Nutrition.
Reason [R]: Human beings follow holozoic mode of Nutrition.
Both statements are true. But Statement 2 is not the correct explanation of Statement 1.
In holozoic nutrition food is engulfed and diegstion is completely intracellular. It involves various steps like ingestion, digestion, absorption, assimilation and egestion. Humans undergo holozoic nutrition but it is just a type of heterotrophic nutrition. Hence, R is not an explanation for A.