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
Chromosome X is 
Select and explain. 
A. Metacentric, B. Submetacentric, C. Acrocentric, D. Telocentric
B: Submetacentric
Answer: B: Submetacentric 
Explanation: Submetacentric - X-chromosome
Acrocentric - Y-chromosome