Which of the following retractor is used for retracting the lingual flap because of close proximity of lingual nerve to mandibular 3rd molar:
Howarth's retractor:  Howarth's elevator can be used for retracting the lingual flap because of close proximity of the lingual nerve in relation to the impacted third molar.
Howarth retractor.
Austin retractor.
L retractor.
Any of the above.