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 crude bih rate is 30/1000. The number of pregnant females is: 
Select and explain. 
A. 150, B. 165, C. 175, D. 200
A: 150
Answer: A: 150 
Explanation: 150