(i) All alternatives are choices →Universal Affirmative (A–type).
(ii) Some posts are mails→ ParticularAffirmative (I–type)
(iii) No letter is circular → UniversalNegative (E–type).
(iv) Some letters are not circulars→ Particular Negative (O–type).
(3)Some vitamins are syrups.
All syrups are medicines.
I + A⇒ I-type of Conclusion“Some vitamins are medicines”.
Venn diagrams of “Some vitaminsare medicines” :
Venn diagram II supports theConclusion I.