This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
1 would not be correct because there is no default constructor defined, but there are two defined that take parameters (so that means that the default is not created by the compiler). The only correct answer is 4.