Keyhole help

[johnny13oi]

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Hi, I have attached a picture of the question. I am wondering about the bottom 2. I cannot get the answer quoted in the book, and I seriously believe the book itself is incorrect.

If posting this is against the rules please remove this post and I am sorry.
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EDIT Just saw that this might infringe on copyright so I removed the picture. Either way I'm pretty sure the book messed up and draw the keyholes not to scale.

 

[buckey]

What are the answers? I would choose d for 11 and b for 12 although I see slight deviations in those two choices that make me think otherwise.

 

[NOORALLAH]

These are tricky but i think d for 11 and b for 12!!! do u have the answers???

 

[johnny13oi]

According to the book it is C and E. I looked at the explanation but it seems as though either they didn't do it right or draw it to scale. Because it is definitely not those if drawn to scale but I can see how would be those answers if not drawn to scale.

 

[buckey]

i don't think that c and e are correct answers. it is most likely a typo