(A) Dandi March → (III) Mahatma Gandhi - Led by Gandhi in 1930 as part of the Civil Disobedience Movement against the British salt tax.
(B) Chittagong Armoury Case → (II) Surya Sen - The 1930 Chittagong Armoury Raid was led by revolutionary Surya Sen (Master Da).
(C) Kanpur Conspiracy Case → (I) Muzaffar Ahmed - The Kanpur Bolshevik Conspiracy Case (1924) involved communist leaders including Muzaffar Ahmed.
(D) Home Rule Movement → (IV) Bal Gangadhar Tilak - Tilak founded the Home Rule League in 1916 to demand self-government for India.
Hence, Option 4: (A) – (III), (B) – (II), (C) – (I), (D) – (IV) → All historical events are correctly matched with their key figures: Gandhi's iconic salt march, Surya Sen's revolutionary raid, Muzaffar Ahmed's communist conspiracy trial, and Tilak's Home Rule movement → correct