This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pharmacology
Antacid combination of magnesium and aluminium hydroxide are superior because: 
Select and explain. 
A. Rapid and sustained acid neutralizing property, B. Less effect on gastric emptying, C. Likely to alter bowel movement, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D. All of the aboveMagnesium is rapid and aluminium act for long period of time. Magnesium salt causes osmotic diarrhea and aluminium salts causes constipation.