Which one of the following is the correct Passive form of the sentence?

This box contains sweets.

Sweets are contained in the box.

The correct answer is Option (4) - Sweets are contained in the box.

The correct passive form of the sentence "This box contains sweets." is: Sweets are contained in the box.

• In passive voice, the focus shifts from the subject (the box) to the object (sweets).
• The verb "contains" is transformed into "are contained" to reflect this change.
• The correct preposition is "in" rather than "into," making the last option correct.