The source-backed, question-specific record explains: The Battle of the Hydaspes (Battle of Jhelum) was fought in May 326 BCE between Alexander the Great and King Porus (Paurava) on the banks of the Hydaspes River (modern Jhelum). Alexander won but was impressed by Porus's valor. This evidence establishes the historical relationship required in this Important Battles item. A correct solution must preserve the exact battle, date, participants, commander, location, outcome or significance requested by the stem. Similar periods, genres or national traditions do not make two battle facts interchangeable. Option A gives Battle of Jhelum (Hydaspes) and satisfies every condition stated in the question. The remaining choices—Battle of Multan, Battle of the Indus and Battle of Taxila—do not satisfy the complete requirement. The reliable checking method is to identify the named battle first, recall or verify its verified participant or outcome, and then read qualifiers such as “both works,” “original language,” “first published,” “correctly matched” or “incorrectly matched.” These qualifiers determine what counts as the answer. Replaying that method for this Important Battles question confirms Battle of Jhelum (Hydaspes) without relying on option position.
