All Vulnerable		North 4♥		Contract : 6♣
Declarer (W) ♠  K ♥  K ♦  A Q 10 7 ♣  A K Q J 9 7 4	7♦		w Q♥ <	Dummy (E) ♠  A 10 7 4 2 ♥  Q 5 ♦  J 8 6 4 ♣  10 3
		2♥ South
Opponents' trump are split 3-1 and South has still one trump left, but that risk has to be taken. Dummy leads his Q♥, discarding a diamond in Declarer's hand. What does Dummy lead next ?