The exponential growth in the volume of publications in the biomedical domain 
has made it impossible for an individual to keep pace with the advances. Even 
though evidence-based medicine has gained wide acceptance, the physicians are 
unable to access the relevant information in the required time, leaving most of 
the questions unanswered. This accentuates the need for fast and accurate 
biomedical question answering systems. In this paper we introduce INDOC--a 
biomedical question answering system based on novel ideas of indexing and 
extracting the answer to the questions posed. INDOC displays the results in 
clusters to help the user arrive the most relevant set of documents quickly. 
Evaluation was done against the standard OHSUMED test collection. Our system 
achieves high accuracy and minimizes user effort.