Physics 9702 · AS & A Level · Fundamental particles

Fundamental particles — practice question

A $\pi^+$ meson carries a charge of $+e$, where $e$ is the elementary charge. It is made up of an up quark and one additional quark. What might the other quark in the $\pi^+$ meson be?

Aanti-down
Banti-up
Cbottom
Dcharm

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