**Author details**

Uma Ranjan Lal1 \* and Snigdha Lal<sup>2</sup>

1 Independent Researcher, Bariatu, Ranchi, Jharkhand, India

2 Ram Lakhan Singh Yadav College, Bettiah, Bihar, India

\*Address all correspondence to: urlalvv@yahoo.com

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
