(A)xx1a2−yy1b2=1;y−y1a2y1+x−x1b2x1=0(B)xx1a2+yy1b2=1;y−y1a2y1+x−x1b2x1=0(C)xx1a2−yy1b2=1;y−y1a2y1−x−x1b2x1=0(D)xx1a2−yy1b2=−1;y−y1a2y1+x−x1b2x1=0