This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Nutrient and oxygen reach the chondrocytes across perichondrium by 
Select and explain. 
A. Capillaries, B. Diffusion, C. Along neurons, D. Active transpo
B: Diffusion
Answer: B: Diffusion 
Explanation: an impoant fact about cailage matrix is that it is avascular, i.e. not supplied by capillariestherefore, chondrocytes within the matrix must receive nutrients and oxygen by diffusion from vessels that lie outside the cailagethis long-distance diffusion is possible because of the large volume of water trapped within the matrix(Refer: Manish Kumar Varshney's Essential Ohopedics Principles & Practice, 1st edition, pg no. 7, 347)