The passive form of `Who wrote this book?` is—-
By whom is this book written?
By whom was this book written?
By who is this book written?
By whom were this book written?
Explanation:
Correct Answer is: By whom was this book written?

By whom is this book written?
By whom was this book written?
By who is this book written?
By whom were this book written?
Correct Answer is: By whom was this book written?

Remove শব্দটির Noun- Option A: Remove , Option B: Removal , Option C: Re-movement, Option D: Removing, correct answer is: Removal
`Call me if you have any problems regarding your work`. Here `regarding` is a/an- Option A: gerund , Option B: apposition , Option C: preposition, Option D: conjunction, correct answer is: preposition
The noun form of `repeat` is_____. Option A: repeatation , Option B: repeatasion , Option C: repetision, Option D: repetition, correct answer is: repetition
Which one of the following is not a noun? Option A: Loneliness , Option B: Childhood , Option C: Purity, Option D: Fairly, correct answer is: Fairly
Which one is the verb form of the word, `Popular`? Option A: Popularite , Option B: Population , Option C: Popularize, Option D: Populate, correct answer is: Popularize