As East, at favorable vulnerability, you hold:
The auction begins as shown. What is you call?
South goes to 4 and partner leads the A as shown. Dummy plays low. You play the...
After winning the A, your partner plays the Q which also wins. At trick 3, he plays the K as shown below. Dummy trumps with the 9 and you...
Overtrump and play a trump.
Overtrump and play a diamond.
Overtrump and play a club.
Discard a diamond.