Agreement between the company and trustee to look after the interest of debenture holders is called as?

Agency Agreement Trust deed Debenture Trust Deed Debenture Agreement

Debenture Trust Deed

A debenture trust deed is an instrument that a company executes in favour of a debenture trustee, thereby appointing them and defining their role and duties to protect the interest of debenture holders before debentures are offered for public subscription.