To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) class Application1 - This option is incorrect because it only declares the class without specifying any access modifiers.
Option B) public class Application1 - This option is correct because it declares the class with the "public" access modifier, which means the class can be accessed from other parts of the application.
Option C) public static void Application1 - This option is incorrect because it declares a method named "Application1" with the "public" and "static" access modifiers, but it does not declare a class.
Option D) static Application1 - This option is incorrect because it does not specify any access modifiers for the class declaration.
The correct answer is Option B) public class Application1. This option is correct because it declares the class with the "public" access modifier, allowing the class to be accessed from other parts of the application.