It is a genuine pleasure to express my deep sense of thanks and gratitude to my mentor and guide Prof. Rajdeep Routh for his continuous support in my study and research, for his motivation and enthusiasm and giving me direction to move further in the research. His guidance has helped me at every step of this thesis. My sincere thanks also goes to Deep Buch for being my go-to person whenever I had a doubt regarding the topic, always being ready to help and co-ordinating my visits to City of Bhuj.