This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Light index in living room is - 
Select and explain. 
A. 8, B. 15, C. 20, D. 25
A: 8
Answer: A: 8 
Explanation: It is recommended that in living rooms, the daylight factor should be at least 8percent and in kitchens about 10 percent. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 21ST EDITION. PAGE NO - 683