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: Pathology
50 years old male presents with 2 cm right solitary pulmonary nodule on X ray chest with scalloped margins and patient currently smokes 12 cigarettes per day. what is the risk of developing invasive carcinoma for such a patient ? 
Select and explain. 
A. Very low, B. Low, C. Intermidiate, D. High
C: Intermidiate
Answer: C: Intermidiate 
Explanation: Ans. is 'c' i.e., Intermidiate