A spring of force constant k is cut into lengths of ratio $I : 2 :3$ . They are connected in series and the, new force constant is 'K'.- Then they are connected is parallel and force constant is k". Then k, : k, is

Question

$\begin{array}{1 1} (1) 1:6\\ (2) 1:9 \\ (3)1:11 \\ (4) 1:14 \end{array}$