Choose the option in which VOICE in the given sentence has been correctly changed.
We can gain nothing without efforts.

Correct option is A

The correct answer is (a) Nothing can be gained without efforts.
The given sentence is in Active Voice, where the subject “We” performs the action. In the passive form, the object “nothing” becomes the subject, while the modal verb can and tense remain unchanged.
• Definition (Active–Passive Voice):
Active Voice is used when the subject performs the action of the verb.
Passive Voice is used when the subject receives the action of the verb.
• Rule for change (English):
While converting an active sentence with a modal verb into passive, the structure becomes:
Modal + be + past participle (V³), and the object of the active sentence becomes the subject of the passive sentence.
• नियम (Hindi):
Active Voice में subject कार्य करता है, जबकि Passive Voice में subject पर कार्य होता है।
Modal verb वाले वाक्यों में passive बनाते समय modal verb नहीं बदलता और उसके बाद be + verb की तीसरी form आती है।
• Meanings / role of the other options:
• (b) would changes the tense and meaning of the sentence.
• (c) by we is incorrect; it should be by us.
• (d) will changes the tense to future.
Thus, the correct option is (a).