Identify the sentence with the incorrect article :

(A) Both the sons are intelligent.
(B) Captain cook went to an East.
(C) Half the apples are rotten.
(D) Don't play the fool, man.

Choose the correct answer from the options given below :

(B) Only

The correct answer is Option (3) - (B) Only

• (A) Both the sons are intelligent.
  Correct. The article "the" is appropriately used to specify "the sons," indicating particular individuals being referred to.

• (B) Captain cook went to an East.
  Incorrect. The article "an" is wrong here because "East" refers to a specific direction, and it requires "the" to indicate a specific region or area.
  Correct sentence: Captain Cook went to the East.

• (C) Half the apples are rotten.
  Correct. The article "the" is appropriately used to specify "the apples," indicating a particular group of apples.

• (D) Don't play the fool, man.
  Correct. The article "the" is appropriately used here in the idiomatic expression "play the fool," which means "act foolishly."