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: Microbiology
Following is true about C reactive protein -a) Detected by precipitation with carbohydrateb) Raised in acute pneumococcal infectionc) It is an antibodyd) Detected by agglutination test. 
Select and explain. 
A. c, B. d, C. ab, D. bd
D: bd
Answer: D: bd 
Explanation: None