<prompt>  Horizontal rotational tendency is seen in a mandibular class I RPD to the patients left is resisted by the denture bases byThe Lingual slope of the left alveolar ridge and the buccal slope of the right alveolar ridgeThe lingual slope of the right alveolar ridge and buccal slope of the left alveolar ridgeBy the lingual slope of the right and left alveolar ridgeBy the buccal slope of the left and right alveolar ridge 