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: Ophthalmology
The commonest malignant tumour of the lids is: 
Select and explain. 
A. Basal-cell carcinoma, B. Squamous cell carcinoma, C. Adenocarcinoma, D. Melanocarcinoma
A: Basal-cell carcinoma
Answer: A: Basal-cell carcinoma 
Explanation: Ans. Basal-cell carcinoma