Tokyo stocks dropped Monday morning, weighed down by caution before a parliamentary vote to select Japan’s prime minister later in the day that is expected to go to a runoff. The 225-issue Nikkei Stock Average fell 152.58 points, or 0.39 percent, from Friday to 39,347.79. The broader Topix index was down 9.29 points, or 0.34 percent, at 2,732.86. The U.S. dollar strengthened to the mid-153 yen range in Tokyo, as the U.S. currency drew buying on the view that economic policies under the incoming administration of President-elect Donald Trump could spur inflation and lift interest rates, dealers…