Don't feed them the four-ace

You are South. West bid 30 in fours and led the double-four. Your partner, North, played the four-blank. East played the four-deuce. It is on you.

You have two fours left. One is the four-ace. The other is the four-trey. The four-ace is a nickel — five points. The double-four is already the highest four on the table.

You have to follow suit. Which four do you play, and what are you trying not to give away?

The answer is up this evening.