Which is correct?
A.) 24 different kinds of quarks.
B.) 12 kinds of quarks and the corresponding 12 kinds of antiquarks.
C.) 24 kinds of antileptons.
D.) 6 kinds of quarks and the corresponding 6 antiquarks, and 6 kinds of leptons and their 6 corresponding antileptons.
E.) 3 quarks and the corresponding 3 antiquarks, 3 leptons and the corresponding 3 antileptons, and 12 other antileptons.
Ans: D.) 6 kinds of quarks and the corresponding 6 antiquarks, and 6 kinds of leptons and their 6 corresponding antileptons.
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