Text: Kanishka Sharma, Economictimes.com and Agencies PV Sindhu's gallant attempt to win a coveted gold medal for India ended in heart-break in when she went down fighting against Spain's Carolina Marin and settled for a silver in the women's singles badminton competition of the Rio Olympics. The 21-year-old registered a stunning win against Japan's Nozomi Okuhara in the Semi Finals. The two-time world champion, Sindhu emerged victorious by beating Japan's Nozomi Okuhara 21-19, 21-10 in the…