Conservation of electric charge implies that:

charge resides on particles
charge cannot be created or destroyed
equal and opposite charges can be created simultaneously
the total number of charged particles in the universe stays constant

Correct answer: equal and opposite charges can be created simultaneously

Solution

Charge conservation means the net charge of an isolated system is constant. Charges can still be created or destroyed in equal and opposite amounts (e.g., pair production/annihilation), which keeps the net charge unchanged. The number of charged particles can change, and the statement that charge cannot be destroyed at all is too strong.

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