This paper discusses the QA system submitted by Dhirubhai Ambani Institute of Information and Communication Technology, India in the ResPubliQA 2010. We have participated in the monolingual en-en task. Our system retrieves a candidate paragraph that contains the answer to a natural language question. Depending on the n-gram similarity score of the candidate paragraph, a decision is made whether to answer the question or not. The objective of our participation is to test our implementation of various strategies like Query Expansion, n-gram similarity matching, and non-answering criteria.