Amna,
I think that this question is really unanswerable. It's like asking if
Java is better than C# or vice versa. You will get a lot of comments, but no concrete answers.
Plus, most people here at Javaranch are going to tell you to use JSP. We are all biased. Well, Except for Thomas Paul, he likes .NET for some reason
Anyway, my suggestion would be to complete the project with the technology that interests you the most. Here are a few questions
you should answer for yourself that may lead you to a conclusion.
1. Do I have the desire to learn one of these technologies I am not familiar with?
2. Which technology can I be the most profeciant with therefor getting the project done better and sooner
3. Is my professor biased with a technology, thereby giving more points for doing the final project in one technology versus the other?
4. It is merely a question of ASP or JSP or is there going to me more to the project that may sway using one over the other?
Answer these questions and you might find an answer for yourself.
Now, as for my recomendation: JSP