Unilever PLC on Thursday said its third-quarter revenue rose sharply as sales of ice cream jumped and the company logged strong growth in emerging markets. The maker of Magnum ice cream and Dove shampoo reported sales growth on an underlying basis--which strips out the impact of acquisitions, disposals and exchange-rate changes--of 5.7% in the three months ended in September, up sharply from 2.1% growth in the same period a year earlier.