If the given system of equations is <br> $kx +3y-(k-3)=0,\\12x+ky -k=0,$.<br> If the system has infinite solution, then the value of k is ________

Question

$(a) \; - 6 \\(b)\;+6 \\(c)\; \pm 6 \\(d)\;none\; of \;the \;above$