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: Medicine
If a parenteral needle stick injury occurs in a health care worker dealing with AIDS patient which of the following are necessary -a) Serial serological testing of the source personb) Serial serological testing of the health workerc) Zidovudine (AZT) prophylaxis to health care workerd) Wash the part with soap and watere) Wash the part with gloutaraldehyde 
Select and explain. 
A. acd, B. abd, C. cd, D. de
C: cd
Answer: C: cd 
Explanation: None