1. If you choose A, will it mean B is incorrect in all cases. (the condition is either in the present or future, the result is always in the future/indicative/conditional I).
2. If you choose A, does it mean B is incorrect in all cases. (both condition and result are in the present-indicative).
Thank you for your explanations. I see all (does, will & would) are possible depending on the time aspect of the condition and result clauses, and mood of the sentence.