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

In figure X the quarters are symmetric under a half-turn: the top-right quarter turned 180° gives the bottom-left one. So the missing bottom-right quarter must be the top-left quarter turned 180°: no arrowhead, the scalloped corner at the bottom-right, and the S-curve turned the same way. Only option 4 matches.