Q. Assertion (A) The electrons are transferred from zinc to copper through the wire which connects the two rods.
Reason (R) Electricity flows through the salt-bridge by migration of ions from one beaker to other.

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Solution:

The electrons are transferred from to through the metallic wire which connects the two rods. While electricity flows through the salt-bridge by migration of ions from one beaker to other.
Thus, both and are correct but is not the correct explanation of .