Change the following sentence from Assertive to Exclamatory:

The chocolates are very bitter.

How bitter these chocolates are!

The correct answer is Option (2) → How bitter these chocolates are!

To change an assertive sentence to an exclamatory one:

• Use "How" or "What" to emphasize the quality described in the sentence.
• Retain the meaning of the original sentence while adding an exclamatory tone.

"How bitter these chocolates are!" correctly conveys the exclamation about the bitterness of the chocolates. The other options are either ungrammatical or fail to follow the standard exclamatory structure.