Answer
You (3rd seat, none vulnerable) are declaring three notrump; the opponents passed throughout.
The opening lead is the ten of clubs (deuce, four, King). With only seven fast certain winners you have to hope to build two extra winners in spades. You lead the Queen (King, Ace). Your two chances for a ninth trick are (1) ten of spades with East and (2) original K10 doubleton of spades with West.
Which is the better chance? The answer isn’t certain, because West always would cover the Queen of spades with the King from K10 doubleton, usually would cover from King-small, and might or might not cover from three to the King. Still, a good general principle is that any specific doubleton is very unlikely, so we recommend playing East for the ten.
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