Marker for pancreatic non-functional neuro-endocrine tumor is

Ans is 'a' i.e. Chromogranin-A Chromogranin-A (CgA) is a glycoprotein used commonly as a tumor marker in histopathology but also has elevated circulating levels in patients with both functional and non-functional PNETs.Other markers for PNETs - pancreatic polypeptide (PPP), pancreastatin, and neuron-specific enolase (NSE).