This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Urine dipstick shows result +3. What's the value of protein appearing in mg/dl in urine is: 
Select and explain. 
A. 100 mg/dL, B. 300 mg/dL, C. 1000 mg/dL, D. 3000 mg/dL
B: 300 mg/dL
Answer: B: 300 mg/dL 
Explanation: Ans. b. 300 mg/dLDipstick urinalysisAmount of protein in the urine0Normal1+30 mg/dL2+100 mg/dL3+300 mg/dL4+1000 mg/dL