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India    competed    at    the    2016 Summer    Olympics    in    Rio    de Janeiro,   Brazil,   from   5   to   21 August   2016.   The   Indian   roster featured  three  Olympic  medallists from  London,  including  badminton star     Saina     Nehwal,     freestyle wrestler  and  four-time  Olympian Yogeshwar  Dutt,  and  rifle  shooter Gagan   Narang.   Medals   Ranked 67th:  Gold  0,  Silver  1,  Bronze  1, Total  2  Competitors:  117  in  15 sports

Leukocyte, commonly known as a white blood cell (WBC), is a major component in protecting the body against invading microorganisms and body cells with mutated DNA, and they clean up debris. 

B Lymphocyte also called as B-Cells or plasma cells produces the antibodies or immunoglobulins that bind to specific foreign or abnormal components of plasma membranes. This is also referred to as humoral (body fluid) immunity.