True of False?

1. Using an n-step binomial model has the advantage that the delta position required to hedge an option remains constant even as n increases.
2. There are call options and put options with the same conditions. When volatility increases, the price changes for both call and put options are the same.
3. Replicating option positions is exactly the opposite position of hedging option positions.
4. When the minimum variance hedge ratio is 1, the hedge is perfect.