Test Your Lead Defence

Column 10

N-S vul, Playing Teams as South you hold: ♠8765 ♥106 ♦J1086 ♣KJ3. The bidding:

West               North             East                South

  -                     -                       1♦                   Pass               

1♥                   Pass                2NT                 Pass               

3NT                 All Pass         

What do you lead? At Matchpoints?