The answer would be option 3 and the return value would be 2.

Return does not immediately return control the caller like you might expect.

It actually creates a 'Completion Record', which tells the runtime why the function stopped running, and any associated data (return value, exception, etc).

It is at this time (once the function has returned but before control is passed back to the caller) that finally blocks are run.

The finally block also creates a completion record. The runtime now has two completion records with different return values, and it has to pick between them.

It picks the one from the finally block because that's what the spec says it should do.

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