The medium of language has a crucial role in delivering information effectively. We request
pupils to go through both the versions of the book since neither the English medium is a ditto
translation of the Nepali version, nor vice versa. We have created both versions separately to
provide different flavors in the same matter and to accommodate the wide coverage of the
contents. However, some diagrams, charts, tables, and even descriptions in some contexts are
found in both versions.
Generally, qualitative writing demands uniformity in presentation, but we have not followed the
principle of uniformity in this work; rather we have presented different styles of content
delivery to enhance our valuable readers' ability to make choices in writing and even create
unique styles on their own. Despite the variation in presentation framework, we have sincerely
tried to follow the competitive style in pouring ideas. With complete responsibility for this work
in one hand, we would like to welcome all the constructive comments regarding both the
versions in the other. We hope the work will simultaneously assist examinees in discovering the
area of learning and making clusters in their respective presentations.

Authors