The correct answer is A. Antacid.
An antacid is a substance that neutralizes stomach acid. It is used to treat indigestion, heartburn, and sour stomach. Antacids are available over-the-counter and by prescription.
Antiseptics are substances that kill or prevent the growth of bacteria. They are used to clean wounds and prevent infection. Antiseptics are available over-the-counter and by prescription.
Analgesics are substances that relieve pain. They are used to treat headaches, muscle aches, and other types of pain. Analgesics are available over-the-counter and by prescription.
Antibiotics are substances that kill or prevent the growth of bacteria. They are used to treat bacterial infections. Antibiotics are available only by prescription.
Indigestion is a common condition that occurs when the stomach has difficulty digesting food. It can cause symptoms such as heartburn, nausea, and vomiting. Antacids can help to relieve these symptoms by neutralizing stomach acid.