challenge: According to Ptolemy, where was Hyrtacina situated in relation to Polyrrhenia and Lappa?
  
  A. Southeast of Polyrrhenia and west of Lappa
  B. Southwest of Polyrrhenia and north of Lappa
  C. Northwest of Polyrrhenia and east of Lappa
  D. Northeast of Polyrrhenia and south of Lappa
  Answer: 