Which classification of myasthenia gravis represents this st…

Which classification of myasthenia gravis represents this statement: Predominantly affecting oropharyngeal muscles, respiratory muscles, or both; may also have lesser or equal involvement of limb, axial muscles, or both; use of a feeding tube without intubation. 

If the dental hygienist is examining an extracted permanent…

If the dental hygienist is examining an extracted permanent tooth, finds a buccal and lingual root with a furcation in the apical 1/3 of the tooth also presents with a mesial marginal groove and a depression that stretches from occlusal to the CEJ apically.  The dental hygienist could assume that this tooth is which of the following?