Change the following sentence from Active Voice to Passive Voice.
Some local residents were helping the wounded soldier.

Correct option is C

Correct passive voice: (c) The wounded soldier was being helped by some local residents.
Important points:
• The sentence is in Past Continuous Tense (were helping).
• Past Continuous Passive structure: was/were + being + V³
Grammatical Rule (English):
• Active: Subject + was/were + V-ing + Object
• Passive: Object + was/were + being + V³ + by + Subject
व्याकरणिक नियम (Hindi):
• Past Continuous में Passive बनता है: was/were + being + क्रिया का तीसरा रूप (V³)
Why other options are incorrect:
• (a) subject-object उल्टा कर दिया गया; meaning गलत हो गया।
• (b) Simple Past (was helped) हो गया; continuous tense नहीं रहा।
• (d) meaning सही लग सकता है, पर standard direct passive transformation के लिए (c) सबसे उचित है।
Hence, option (c) is the correct answer.