This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Atkin's diet is 
Select and explain. 
A. Protein restricted low calorie diet, B. Carbohydrate restricted low calorie diet, C. Fat restricted low calorie diet, D. Mineral restricted low calorie diet.
B: Carbohydrate restricted low calorie diet
Answer: B: Carbohydrate restricted low calorie diet 
Explanation: Carbohydrate restricted low calorie diet Traditionally, fat restricted, low calorie diet has been used for weight loss. Atkin's proposed a new theorey for weight loss based on carbohydrate restricted low calorie diet