When Feng Chuan, a primary school student, passed by a residential building on school, he was hit by

Analysis of test question A: The collapsed material in the question, "the glass that fell from the balcony of Liu's house cut the ear of primary school student Feng Chuan", indicating that Liu infringed on the right to life and health of primary school student Feng Chuan, and Liu should bear the corresponding liability for compensation and should compensate Feng Chuan's medical expenses. It can be seen that item A is in line with the topic and can be selected; The national law protects citizens' right to life and health from infringement, so items B and C do not meet the topic, so they cannot be selected; Feng Chuan's school was not at fault for hail in this incident and should not be liable for compensation, so item D is not in line with the topic and cannot be selected.

Therefore, the answer is item A.