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: Radiology
A 25 year old male patient complains of pain in the lower back tooth region. History of similar complaint 6 months ago.
Intra-oral examination reveals pericoronitis with 36. An IOPA is taken with the same tooth. During film processing, the thermometer in the manual processing tank reads 68◦F. The approximate time to keep the x-ray film in the developer solution is? 
Select and explain. 
A. 2 minutes, B. 3 minutes, C. 4 minutes, D. 5 minutes
D: 5 minutes
Answer: D: 5 minutes 
Explanation: Processing films at either higher or lower temperatures and for longer or shorter times than recommended by the manufacturer reduces the contrast of the processed film.