Correct Answer: Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)

Solution : The amount of nourishment needed by people of various ages is determined by an advisory council that ICMR puts up.
I) For individuals residing in rural areas of India, the government has set a daily calorie consumption or nutritional content limit of 2400 calories.
II) The people who live in urban regions are given a calorie need of 2100 calories by the Indian nutritional standards since they engage in fewer physical activities each day.
Because people in rural areas engage in more physically demanding activities like farming, caring for livestock, fishing, etc., their calorie needs are higher than those of metropolitan areas.
Hence option a is the correct answer.