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On an LED, one leg will be shorter than the other. The shorter leg is the negative polarity.
Anode and cathode. Anode = negative lead, cathode = positive lead.
A positive times a positive equals a positive, a negative times a negative equals a positive, a negative times a positive equals a negative(vice versa for the last one)
If your point is positive positive it is in 1. If tour point is negative positive it is in 2. If your point it negative negative it is in 3. And if your point it positive negative it is in 4.
The answer will depend on the context in which the legs are defined. Since no information on that is provided, it is not possible to give a more helpful answer.