Which of the following cocktails is topped with soda water as a finishing touch?

The Singapore Sling is indeed topped with soda water as a finishing touch, which adds a refreshing effervescence to the cocktail. This bubbly element not only enhances the overall drinking experience but also helps to balance the sweetness and complexity of the other ingredients in the drink. The soda water lightens the overall flavor, making it a more approachable and enjoyable cocktail.

In a classic Singapore Sling, the combination of gin, cherry brandy, and other fruit juices is complemented by the carbonation provided by the soda. This is particularly important given the rich and fruity profile of the drink, allowing for a more layered and refreshing sip. The inclusion of soda water distinguishes the Singapore Sling from other cocktails that may be richer or heavier without such a finishing touch.