(5)(a)Any liability to reimburse the Central Government imposed by clauses (a) and (b) of sub-section (1) shall, subject to satisfaction of the right of the Central Government to reimbursement, be a liability also to indemnify all persons against liability under clause (c) of that sub-section.(b)Any such liability imposed by the said clause (a) shall, subject as aforesaid, be a liability also to indemnify all persons against liability under the said clause (b).(c)Any person liable under the said clause (a) or (b) or sub-clause (i) or (ii) of the said clause (c) shall be entitled to contribution from any other person liable under the same clause or sub-clause, as the case may be, according to the amount of their respective liabilities thereunder.