The Sensex at the Bombay Stock Exchange dropped 73 points, or 0.4 per cent, to close at 19,244, today, on profit-booking triggered by a lower growth projection for the current fiscal, and amid weak European bourses. The Nifty at the National Stock Exchange fell 22 points, or 0.4 percent, to 5,858.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.