This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
Which one of the following NOT a contraindication in Porphyria? 
Select and explain. 
A. High calorie diet, B. Phenobarbitone, C. Alcohol, D. Norethisterone
A: High calorie diet
Answer: A: High calorie diet 
Explanation: (A) High calorie diet # High calorie diet and intravenous dextrose are used as treatment in Acute Porphyria. Alcohol, Phenobarbitone, and Norethisterone are enzyme inducers, which are causing more Heme precursosrs production and thereby are contraindicated in Acute Porphyria.