Correct option is B
The correct passive voice of the given sentence is (b).
Correct passive sentence:
The fireworks will be started by them after midnight.
Rules of conversion (Active → Passive):
·
Active structure: Subject + will + base verb + object
·
Passive structure: Object + will be + past participle + by + subject
Application:
· Subject →
They
· Object →
the fireworks
· Verb →
will start →
will be started
Why other options are incorrect:
·
(a) Uses
“are going to”, which changes the original tense.
·
(c) Removes the agent (
by them), which is
not required here.
·
(d) Uses an awkward noun phrase (
Starting of the fireworks), not preferred in SSC exams.