This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pneumothorax, Subject name: Medicine
Which parameter is the best to differentiate cardiac tamponade from tension pneumothorax? 
Select and explain. 
A. Raised JVP, B. Breath sounds, C. Raised Hea rate, D. Not improving after initial fluid resuscitation
B: Breath sounds
Answer: B: Breath sounds 
Explanation: Option A - Raised JVP is seen in both. Option B - Absent breath sound in tension pneumothorax Option C - Raised hea rate is a non-specific finding. Option D - both are example of obstructive shock, so IV fluid will not work.