system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Common about tumors of PNS and Nasal Ca-a) Sq cell Ca is the M.C. typeb) Adeno Ca is the M.C typec) Melanoma can occurd) Adeno cystic Ca
assistant
The correct answer is  None