Statement I is true because Milk of Magnesia is often taken during indigestion to relieve stomach pain.

Statement II is also true because Milk of Magnesia is a base, specifically magnesium hydroxide (Mg(OH)2). When it is ingested, it reacts with the excess stomach acid (which causes the pain) and neutralizes it by forming magnesium chloride (MgCl2) and water (H2O). This neutralization process helps to alleviate the pain and discomfort associated with indigestion.

Option 1 is the correct answer because both statements are individually true, and Statement II provides the correct explanation for Statement I. The basis for taking Milk of Magnesia during indigestion is to neutralize excessive stomach acid, and the fact that Milk of Magnesia is a base supports this explanation.

Therefore, this option correctly states that both statements are true and that Statement II provides the explanation for Statement I. No alert is needed as the provided answer is correct.