Unknown

A 64-year-old woman complains of intermittent abdominal discomfo in the right iliac fossa along with loss of appetite and significant weight loss over 6 months. She was managed conservatively. She presented 2 days later with a cramping abdominal pain at the same location along with diarrhoea. During these episodes her husband has commented that she looked red in the face. CECT abdomen was done. Which of the following tumour markers can be seen raised in the above condition: -