Which of the following statements are correct about an if-else statements in a C-program? 1. Every if-else statement can be replaced by an equivalent statements using ?: operators 2. Nested if-else statements are allowed. 3. Multiple statements in an if block are allowed. 4. Multiple statements in an else block are allowed.

• A. 1 and 2
• B. 2 and 3
• C. 1, 2 and 4
• D. 2, 3, 4