दिए गए चार विकल्पों 1, 2, 3, 4 में से कौन सा, आकृति X की पूर्ती करता है?

In figure X diagonally opposite quarters match: the top-right and bottom-left quarters both hold a wide band. So the missing top-left quarter must match the bottom-right one (an arc with a quarter-disc inside), which is option 4.