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: Surgery
Which of the following is true regarding unilateral cleft lip? 
Select and explain. 
A. Occurs more on right side, B. Occurs more on left side, C. No left or right predilection, D. Occurs with equal frequency on left and right side
B: Occurs more on left side
Answer: B: Occurs more on left side 
Explanation: Cleft lip/palate predominates in males whereas cleft palate alone appears to be more common in females. In unilateral cleft lip the deformity affects the left side in 60% of cases.