This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'On Contrast radiography which among the following is false? \nSelect and explain. \nA. Ileum is featureless, B. Colon has haustrations, C. Jejunum is feathery, D. Distal part of duodenum has a cap', 'role': 'user'}, {'content': "Answer: D \nExplanation: The first part of the duodenum has the duodenal cap or bulb and not the distal part.\nThe first part of the duodenum is visible as a triangular shadow on barium studies and is known as the duodenal cap.\nThe small intestine contains mucosal folds known as plicae circulares or valvulae conniventes that are visible on barium studies and help in the distinction between small intestine and colon. Colon instead can be identified by the presence of haustrations.\nValvulae conniventes are more prominent in the jejunum giving the 'feathery appearance' on barium. These mucosal folds are gradually reduced distally giving a 'featureless' appearance of the distal ileum.", 'role': 'assistant'}]