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: Dental
Which of the following is true regarding pulp component of PUFA? 
Select and explain. 
A. Detected without use of probe, B. Pus drainage with swelling, C. Sinus tract detected with pain, D. Ulceration with pulp involvement
A: Detected without use of probe
Answer: A: Detected without use of probe 
Explanation: PUFA index by Monse et al (2010)
The PUFA index records the presence of severely decayed teeth with:

Visible pulpal involvement - (P/p)
Ulceration caused by dislocated tooth fragments - (U/u)
Fistula - (F/f)  
Abscess - (A/a).

Pediatric Dentistry Principles and Practice
M.S.Muthu