Some tablets are medicines. Some syrups are not capsules. Some tablets are not syrups.
All capsules are medicines. (A) + No medicine is a syrup. (E) ⇒ No capsule is a syrup. (E) ⇒ Conversion ⇒ Some syrups are not capsules. (O) Some tablets are capsules (I) + All capsules are medicines. (A) ⇒ Some tablets are medicines. (I) + No medicine is a syrup. (E) ⇒ Some tablets are not syrups. (O). Hence, option 1 is correct.