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
A child presented with difficulty in seeing the blackboard in school. His teachers say that he frequently squeezes his eyes. Most probable cause is – 
Select and explain. 
A. Hypermetropia, B. Myopia, C. Presbyopia, D. Astigmatism
B: Myopia
Answer: B: Myopia 
Explanation: Difficulty in seeing distant object (blackboard) and frequent squeezing of eye are features of myopia.