Updates
** Vedanta VDAN.NS drops 4.7% to 435 rupees; stock top drag on metals index .NIFTYMET, which is down 2%
** Shortseller Viceroy says it has shorted the debt stack of Vedanta Resources, VDAN's UK-based parent
** Vedanta did not immediately respond to Reuters' request for comment
** Co's zinc mining unit Hindustan Zinc HZNC.NS down 3.2%
** Vedanta Resources is "systematically draining" Vedanta, Viceroy says
** YTD, VDAN down 2.3% vs NIFTYMET's 8% climb
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))