Both Rabies and Polio can cause paralysis of the legs. However, it is more likely to receive paralysis after encountering rabies, as 20% of rabies cases are paralytic. Also, considering rabies is received from a bite that came from an infected animal, we can suppose that you are more likely to be bitten on the leg, as most animals are smaller that humans, which would ultimately cause leg paralysis. On the other hand, Polio is a neurological disease that disrupts the transmission of nervous impulses to certain muscles, such as the legs.
In conclusion, there is no certain one answer as both rabies and polio can cause leg paralysis