This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
True about C. jejuni (NOT RELATED -MICROBIOLOGY) 
Select and explain. 
A. Gram-positive bacillus, B. Symptoms may initially mimic cholecystitis, C. Most often occurs several days after consumption of undercooked chicken., D. Penicillin in drug of choice
C: Most often occurs several days after consumption of undercooked chicken.
Answer: C: Most often occurs several days after consumption of undercooked chicken. 
Explanation: Campylobacter species are small motile, non-spore-forming, comma-shaped, gramnegative bacilli, best grown in a microaerophilic environment at 42degC (107.6degF).C. jejuni gastroenteritis is usually self-limited; however, if necessary, erythromycin is the drug of choice.Campylobacter infection most often occurs several days (upto 7 d) after consumption of undercooked chicken.Symptom of fever and abdominal pain may initially mimic appendicitis/ pseudoappendicitis.Guillain-Barre is a rare neurological complication of C. jejuni gastroenteritis.