If the line  joining the points (k,1,2),(3,4,6) is parallel to the line joining the points (−4,3,−6),(5,12,l) then (k,l)=

D.r’s of a line joining (k,1,2),(3,4,6) are (3−k,3,4)D.r’s of a line joining (−4,3,−6),(5,12,l) are (9,9,l+6)Since these two lines are parallel 3−k9=39=4l+6, ⇒k=0,l=6