Orgo multiple choice problems

[.Andrew.]

I completed the rest of the assignments all thats left are these multiple choice problems. Could you help me out on them?

http://imageshack.us/photo/my-images/407/orgo71.png/

http://imageshack.us/photo/my-images/199/orgo72.png/

http://imageshack.us/photo/my-images/833/orgo73.png/

Can anyone help me solve these?