Q: How many types of leptons are there?


Read this paragraph and choose the correct option from the provided answers:

There are also six types of leptons, including electrons. Leptons have an electric charge of either -1 or 0. Electrons, for example, have a charge of -1. Leptons have mass, although the mass of electrons is extremely small.

 Choices:

- nine

- two

- twelve

- six


A:
six