चित्र X को दिए गए विकल्पों 1, 2, 3, 4 से पूरा कीजिये।

In X the arrows run clockwise round the inner diamond, every outer corner has a shaded quarter-disc with an arc, and the centre has a shaded disc with a ring. The missing bottom-right quarter must have the arrows pointing down-left (continuing clockwise), the arrow line on the centre side of the diagonal, and corner marks at both its inner and outer corners. Only option 4 matches.