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The pKa of acetylsalicylic acid (aspirine) is 3.5. The pH of gastric juice in human stomach is about 2-3 and the pH in the small intestine is about 8. Aspirine will be:

(a) unionised in the small intestine and in the stomach

(b) completely ionised in the small intestine and in the stomach

(c) ionised in the stomach and almost unionised in the small intestine

(d) ionised in the small intestine and almost unionised in the stomach