Which of the following statements is correct?

• It is not possible to extend the if statement to handle multiple conditions using the else-if arrangement.
• The switch statement can include any number of case instances with two case statements having the same value.
• A jump statement such as a break is required after each case block excluding the last block if it is a default statement.
• The if statement selects a statement for execution based on the value of a Boolean expression.
• C# always supports an implicit fall through from one case label to another.