# Which of the following is a common antacid ?

$(a)\;NaOH\qquad(b)\;Ca(OH)_{2}\qquad(c)\;Mg(OH)_{2}\qquad(d)\;KOH$

Answer : $\;Mg(OH)_{2}$
Explanation :
Magnesium hydroxide , $\;Mg(OH)_{2}\;$ is common antacid .