Correct Answer - Option 3 : Only conclusion II follows
The logic is:
I. This is not a good book → False (As per the statements all good books help and this book can help, so it can be interpreted that this is a good book)
II. This is a good book → True (As per the statement ‘This book
can help because all good books help’ which can be interpreted that All good books help)
III. No good book helps → False (As per the statement all good
IV. Some good books help → False (As per the statement all good
Hence, only conclusion II follows is the correct answer.