From $AE = CF$ and the fact that perpendicular from centre bisects chord, we conclude—

Question

Accepted Answer

$\frac{1}{2}AB = \frac{1}{2}CD$ so $AB = CD$

Answer

$AB = 2CD$

Answer

$AB = \frac{1}{2}CD$

Answer

$AB \perp CD$

From AE=CFAE = CFAE=CF and the fact that perpendicular from centre bisects chord, we conclude—