According to ICMR-NIN RDA 2020, the RDA of protein for healthy Indian adult men is—

Correct option is B

• The ICMR–NIN RDA 2020 recommends 0.83 g of protein per kg body weight per day for healthy adult men.
• This requirement reflects the amount needed to maintain nitrogen balance, support metabolic functions, and preserve lean body mass.
• The recommendation considers digestibility and quality of commonly consumed Indian diets.
• Option (a) 0.66 g/kg/day represents the old EAR reference, not the updated RDA.
• Option (c) 0.72 g/kg/day is below the recommended level and insufficient for most adults.
• Option (d) 1.4 g/kg/day is much higher and falls into athlete/protein-supplementation range, not normal adult requirements.