Few questions regarding PSM1

Good morning!

Could somebody help me, please?

I read "The Scrum Master Training Manual" Version 1.2. (By Nader K. Rad, Frank Turley)
There is Self-Assessment at the end of the book.
There are some interesting questions:

7. How long is a Sprint Review in a one month Sprint?
A. 1 hour
B. 2 hours (correct according to the answers in the book)
C. 4 hours
D. 8 hours
E. It is not time-boxed (as long as needed)

7. How long is a Sprint Retrospective in a one month Sprint?
A. 1 hour
B. 3 hours
C. 4 hours (correct according to the answers in the book)
D. 8 hours
E. It is not time-boxed (as long as needed)

Looks like that it is misprint: the first - C, the second - B, correct?