Answer:
B. Post hoc ergo propter hoc (meaning "after this, therefore because of this"). This is a fallacy that assumes that because one event occurred before another event, it must have caused the second event. In this case, the speaker is assuming that because the uncle took ivermectin and did not get COVID-19, the drug must have prevented the disease, without considering other factors that may have played a role.
Step-by-step explanation: