You are in 4th seat at favorable vulnerability, holding:
987432
A8
Q74
Q6.
LHO deals and opens 2. Your partner doubles and RHO passes. And you?
Pass
2
2NT
3
3NT
4
Other
Partner raises to 4. The K is led. Your plan?
Win the A and return a heart.
Win the A and play diamonds.
Win the A and play clubs.
Win the A and play a trump.
Let the K win the first trick.