This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Tight junctions are seen in all except 
Select and explain. 
A. Cardiac muscle, B. Renal tubules, C. Intestine, D. Choroid plexus
A: Cardiac muscle
Answer: A: Cardiac muscle 
Explanation: Tight junctions are seen along the apical margins of cells in epithelium such as the intestinal mucosa, the walls of the renal tubules, and the choroidal plexus.(Ref: Textbook of physiology AK Jain 4th edition page no.9)