To answer this question, you need to understand the syntax for declaring methods in a programming language. Let's go through each option to understand why it is correct or incorrect:
Option A) void method1 { /* ... */ } - This option is incorrect because it is missing the parentheses after the method name. The correct syntax for declaring a method includes the parentheses to enclose any parameters that the method may take.
Option B) void method2() { /* ... */ } - This option is correct because it follows the correct syntax for declaring a method. The method name is "method2" and it does not take any parameters, as indicated by the empty parentheses. The return type of the method is "void", indicating that the method does not return a value.
Option C) void method3(void) { /* ... */ } - This option is incorrect because it includes the keyword "void" as a parameter. In most programming languages, the "void" keyword is used only as the return type to indicate that the method does not return a value. It should not be used as a parameter.
Option D) method4() { /* ... */ } - This option is incorrect because it does not specify a return type for the method. In most programming languages, you need to specify the return type of a method, even if it is "void" to indicate that the method does not return a value.
The correct answer is B) void method2() { /* ... */ }. This option is correct because it follows the correct syntax for declaring a method and does not have any errors or missing components.