<prompt> All are false about McEwens triangle except:Mastoid antrum lies 1.5 cm deep to itSurgical landmark for facial nervePresent in preauricular regionIt is bounded by suprameatal crest anteriorly  <response>: a Mastoid antrum lies 1.5cm deep to itRef. Shambaugh, 6th ed., page 32It is a surgical landmark for the mastoid antrum, lying in the postauricular area. It is bounded superiorly by temporal linesupra mastoid crest which is the posterior extension of suprameatal crest.The suprameatal crest is the superior root of the zygomatic process. 