Read the statements given below & choose the correct option. Assertion (A): The rumen and caecum of ruminants have bacteria that help in digestion. Reason (R): Bacteria of the rumen ferment the food and release gases with a high concentration of methane.

What type of dentition do humans have based on the fact that they get two successive sets of teeth during their lifetime?

Milk is a critical component of a balanced diet. Which essential macronutrient does milk primarily provide as the only complete animal-based source in a strict vegetarian diet?