Final answer:
A medium-sized banana provides approximately 120 calories from carbohydrates.
Step-by-step explanation:
The approximate number of calories from carbohydrates provided by a banana is approximately 120 calories.
A banana is a good source of carbohydrates and contains about 30 grams of carbohydrates in a medium-sized banana. Each gram of carbohydrates provides about 4 calories, so multiplying 30 grams by 4 calories gives us 120 calories.
Therefore, option C) Approximately 120 calories is the correct answer.