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: Medicine
A 42-year-old engineer developed redness of the glans and radial fissuring of the prepuce 2 weeks ago. A Potassium hydroxide preparation of scrapings from the glans showed pseudohyphae and buds. Which one of the following systemic illness should he be screened for - 
Select and explain. 
A. Pulmonary tuberculosis, B. Diabetes mellitus, C. Systemic Candidiasis, D. Chronic renal failure
B: Diabetes mellitus
Answer: B: Diabetes mellitus 
Explanation: None