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.
Option d) is incorrect because the values are not obtained from the deployment descriptor. The values are set in the deployment descriptor but they are made available to the beans at runtime through the JNDI environment. The way it's worded, option d) sounds like "You get the values by reading them from the deployment descriptor" which is not correct.