**Core Concept**
The mid-day meal program aims to provide a nutritious meal to school children to support their growth and development. The meal should supply essential calories, proteins, and other nutrients to ensure the child's optimal health.

**Why the Correct Answer is Right**
The correct answer is based on the recommendation of the World Health Organization (WHO) and the Indian government's guidelines for the mid-day meal program. The meal should provide at least 450 calories, 12-15 grams of protein, and 60-70 grams of carbohydrates per child per day. This is to ensure that the child's nutritional needs are met, and they do not suffer from malnutrition or related health issues.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not meet the minimum calorie requirements for a child's growth and development.
**Option B:** This option is incorrect as it does not specify the amount of protein required for a child's growth and development.
**Option C:** This option is incorrect as it does not meet the minimum calorie and protein requirements for a child's growth and development.

**Clinical Pearl / High-Yield Fact**
It is essential to note that the mid-day meal program should also provide a balanced mix of essential nutrients, including vitamins, minerals, and fiber, to support the child's overall health and well-being.

**Correct Answer: D. 450 calories, 12-15 grams of protein, and 60-70 grams of carbohydrates.**