Horizontal rotational tendency is seen in a mandibular class I RPD to the patients left is resisted by the denture bases by
The Lingual slope of the left alveolar ridge and the buccal slope of the right alveolar ridge
The lingual slope of the right alveolar ridge and buccal slope of the left alveolar ridge
By the lingual slope of the right and left alveolar ridge
By the buccal slope of the left and right alveolar ridge