The correct sequence of the following involved in the isolation of DNA

(I) Spooling        (II) Lysozyme          (III) Ribonuclease              (IV) Ethanol
(a) (II), (I), (III), (IV)
(b) (IV), (III), (I), (II)
(c) (III), (I), (II), (IV)
(d) (II), (III), (IV), (I)