The Student Room Group

A particle puzzle

I’m struggling with this problem, I figured out positron for B, and with information given by A, I think C is π-, D is p and E is (bar)K^0, I tried A for muon but it didn’t work, could anyone help me out please?
https://isaacphysics.org/questions/particle_puzzle?board=14bc5706-3a12-40a2-948a-9e2c18e8c6c9&stage=a_level
I just did this question and got the same answer, but then remembered that proton also has a charge

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