Transform the given sentence from passive to active voice: "How can this be done?"

Answer: c) How can you do this?

• How দ্বারা শুরু Interrogative Sentence কে Active voice থেকে Passive Voice করার নিয়ম: 
→ How + auxiliary verb + object + Verb- এর past participle form + by + active এর subject + question mark (?)

Example:
Active Voice: How can you do this?
Passive Voice: How can this be done by you?

• How দ্বারা শুরু Interrogative Sentence কে Passive Voice থেকে Active voiceকরার নিয়ম:
How + Modal verb + passive voice এর object + verb এর present form + passive voice এর subject. 

Source: A Passage to the English Language, S.M. Zakir Hussain, Website English Wizard, Saleh Ahmed