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: Anatomy
Sympathetic supply to the heas is from which of the following: 
Select and explain. 
A. T1 toT5, B. T 2 toT6, C. T 3 toT7, D. T4 toT8
A: T1 toT5
Answer: A: T1 toT5 
Explanation: T1 toT5