Let's carefully analyze this.
The th roots of unity are complex numbers satisfying:

These can be written as:

Now, the modulus of any complex number in this form is:

This is true for all , because all nth roots of unity lie on the unit circle in the complex plane.
So for the options:

• doesn't make sense because all moduli are 1, and is actually (cyclic), so this is false.

• again false because all moduli are 1.

• would imply , false.

• yes, true, because all have modulus 1.

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