x NOWLEDGEMENT c Ohis report bears the imprint of many people and without their support would not have existed. First of all we would like to express our sincere indebtness and profound se nse of gratitude to our parents without their support in all our endeavours we would not have been able to give this project its present shape. We acknowledge our deepest thank to MISS NEHx BHxRDWx, for all his guidance and encouragement which leads us al l through this project. Suggestions at all point of time are invaluable for us. We would like to put on record our sincere gratitude to all our friends for giving us valuable ideas throughout our project.