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: Ophthalmology
Secondary tumour may spread to the orbit by all of the following except: 
Select and explain. 
A. Direct spread from the lids, B. Via blood stream, C. Via lymphatic channels, D. Directly from the cranial cavity
C: Via lymphatic channels
Answer: C: Via lymphatic channels 
Explanation: Ans. Via lymphatic channels