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: Social & Preventive Medicine
In a community of 5000 people, the crude birth rate is 30 per 1000 people. The number of pregnant females is? 
Select and explain. 
A. 165, B. 150, C. 175, D. 200
A: 165
Answer: A: 165 
Explanation: None