Which of the following persons cannot sue for redemption?

S.91. Persons who may sue for redemption.—Besides the mortgagor, any of the following persons   may redeem, or institute a suit for redemption of, the mortgaged property, namely:— (a) any person (other than the mortgagee of the interest sought to be redeemed) who has any   interest in, or charge upon, the property mortgaged or in or upon the right to redeem the same; (b) any surety for the payment of the mortgage-debt or any part thereof; or (c) any creditor of the mortgagor who has in a suit for the administration of his estate obtained a   decree for sale of the mortgaged property.