A 56 year-old man with a cerebral mass. This is a cytologic preparation obtained during intraoperative consultation. The features are suggestive but not diagnostic of which of the following:

1. Astrocytoma.

2. Metastatic melanoma.

3. Medulloblastoma.

4. Meningioma.

A.  1,2, and 3 are true.      

B.  1 and 3 are true.

C.  2 and 4 are true.          

D.  4 is true.