The direction ratios of the line perpendicular to the lines x − 7 / 2 = y + 17 / − 3 = z − 6 / 1 and x + 5 / 1 = y + 3 / 2 = z − 4 / − 2are proportional to
A. 4, 5, 7
B. 4, –5, 7
C. 4, –5, –7
D. –4, 5, 7