{"knowledge_schema": {"broad_category": "Physics \u2192 Electromagnetism \u2192 Maxwell's Equations", "refinement": "This problem examines the implications of magnetic monopoles on Maxwell's equations, specifically how the presence of isolated magnetic poles alters the standard equations.", "specific_scope": "The focus is on identifying which specific Maxwell's equations would change if magnetic monopoles existed in a parallel universe.", "goal": "Determine which equations in Maxwell's set would be modified due to the existence of isolated North or South magnetic poles."}, "summary": "In a parallel universe where magnetic monopoles exist, Maxwell's equations would be altered to account for the divergence of the magnetic field, which traditionally states that magnetic field lines are closed loops with no beginning or end. The specific equation that would change is the one related to the divergence of the magnetic field, as it would need to include terms for magnetic charge density. Therefore, the correct answer is option 3: The one related to the divergence of the magnetic field."}