The correct options are
A Liver
B Pancreas
C Gall bladder
Accessory digestive organs help in digestion, but is not a part of the digestive system. The salivary glands, pancreas, liver and gallbladder are not part of the digestive system but release their secretion into the digestive tract. These secretions are essential for digestion.
Stomach, on the other hand, is a part of the digestive system, which also secretes enzymes and HCl. It holds the food that we consume and is also a site for digestion.