law: Transfer of Property Act, 1882
  61. Right to redeem separately or simultaneously
  A mortgagor who has executed two or more mortgages in favor of
  
  the same mortgagee shall, in the absence of a contract to the contrary, when
  
  the principal money of any two or more of the mortgages has become due, be
  
  entitled to redeem any one such mortgage separately, or any two or more of such
  
  mortgages together.