Tendon like cords extending between atrioventricular valves and papillary muscles in the heart of Rabbit are

Question

$\begin {array} {1 1} (1)\;Bundle\: of\: His & \quad (2)\;Purkinje\: fibres \\ (3)\;Chordae\: tendinae & \quad (4)\;Columnae\: Corneae \end {array}$