The correct answer is C. Ptosis. Explanation: Ptosis (specifically blepharoptosis) refers to the abnormally low positioning or drooping of the upper eyelid over the eye. It can affect one or both eyes and may be congenital or acquired (due to causes such as levator palpebrae superioris muscle weakness, nerve damage—like oculomotor nerve/CN III palsy or Horner syndrome—myasthenia gravis, or age-related aponeurotic changes).

The correct answer is C. Omeprazole. Explanation Omeprazole is a Proton-Pump Inhibitor (PPI). It works by irreversibly inhibiting the \text{H}^+/\text{K}^+-ATPase pump (the "proton pump") located in the gastric parietal cells. This blocks the final step of gastric acid production, significantly reducing stomach acid secretion. Indications: Used to treat gastroesophageal reflux disease (GERD), peptic ulcer disease (PUD), Zollinger-Ellison syndrome, and for Helicobacter pylori eradication regimens.