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
A patient was on treatment with penicillin. He developed pallor but there was no shoness of breath, uicaria or wheezing. On investigation, antibodies against penicillin were found in his blood. What is the type of hypersensitivity reaction that most likely occurred in this patient? 
Select and explain. 
A. Type I hypersensitivity, B. Type II hypersensitivity, C. Type III hypersensitivity, D. Type IV hypersensitivity
B: Type II hypersensitivity
Answer: B: Type II hypersensitivity 
Explanation: Ans. b. Type II hypersensitivity