Which of the following is NOT a variety of apple?

Granny Smith is actually a well-known variety of apple, recognized for its tart flavor and green skin. It is commonly used in cooking and baking due to its crisp texture and acidity, making it a popular choice for pies and salads.

Royal Gala, Braeburn, and Cox are also legitimate apple varieties. Royal Gala is prized for its sweetness and color, Braeburn is appreciated for its balance of sweet and tart flavors, and Cox is known for its aromatic and complex flavor profile. Each of these apples has distinct characteristics and usage in culinary practices. Therefore, the assertion that Granny Smith is not a variety of apple is incorrect.