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: Dental
Causes of asymmetrical Moro's reflex? 
Select and explain. 
A. Fracture of clavicles, B. Fracture of humerus, C. Erb's palsy, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: The Moro reflex is an infantile reflex that develops between 28–32 weeks of gestation and disappears between 2-3 months of age. It is a response to a sudden loss of support and involves three distinct components: spreading out the arms (abduction) pulling the arms in (adduction) and startled look.
*Asymmetrical moro's reflex: still present at 6 months
 Causes: 

Fracture of clavicles
Fracture of humerus
Erb's palsy