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doesn't annihilation only occur between matter and its direct counterpart i.e. positron annihilates an electron mesons are not necessarily made up of quark/antiquark pairs e.g. pion, which is an anti up quark and a down quark, net charge -1 BTW, his post is the first one : | | v

my teacher said do 2, but apparently they can ask specifically for all of them same with the stimulus texts

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