Which of the following is the milk of magnesia?

Q. Which of the following is the milk of magnesia?

1. Ammonium hydroxide (NH4OH)
2. Sodium hydroxide (NaOH)
3. Magnesium hydroxide (Mg(OH)2)
4. Potassium hydroxide (KOH)

Answer: Magnesium hydroxide (Mg(OH)2)