Birbeck's granules in the cytoplasm are seen in: (A) Langerhan's cells, (B) Mast cell, (C) Myelocytes, (D) Thrombocytes
Answer is A. ref Robbins 9/e p622 Birbeck granules, also known as Birbeck bodies, are rod shaped or "tennis-racket" cytoplasmic organelles with a central linear density and a striated appearance. First described in 1961 (where they were simply termed "characteristic granules"), they are solely found in Langerhans cells.