Option (b.) 100 Calories will be the right one.
Basal metabolic rate (BMR) is the total number of calories your body needs to perform essential, life-sustaining functions which include circulation, breathing, cell production, nutrient processing, protein synthesis, and ion transport.
Generally a person burns calories continuously throughout the day in order to carry out basic life functions, for example-breathing, circulation, and digestion.
Equation to Calculate Your BMR:-
There is an equation given by Harris-Benedict which is often used to estimate basal metabolic rate which is mentioned below:-
Men: BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) - (5.677 x age in years)
Women: BMR = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) - (4.330 x age in years)
To learn more about basal metabolic rate here
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