((a)) If the debtor refuses to pursue a cause of action under section 544, 545, 547, 548, 549(a), or 550 of this title, then on request of a creditor, the court may appoint a trustee to pursue such cause of action.

((b)) A transfer of property of the debtor to or for the benefit of any holder of a bond or note, on account of such bond or note, may not be avoided under .