Choose the most appropriate option to convert the following sentence in Active Voice into Passive Voice:

The labourers were digging a canal.

A canal was being dug by the labourers.

The correct answer is Option (2) → A canal was being dug by the labourers.

• The original sentence is in the past continuous tense ("were digging").
• In Passive Voice, the structure for past continuous tense is:
  was/were + being + past participle.
• The subject (labourers) becomes the agent, and the object (a canal) becomes the subject.