The projection of a line segment on $x,y,z$ axes are $12,\:4,\:3$ respectively, then the length of the line segment is ?

Question

$(a)\:\:13\:\:\:\qquad\:\:(b)\:\:19\:\:\:\qquad\:\:(c)\:\:11\:\:\:\qquad\:\:(d)\:\:None\:of\:these.$