What do the arrows mean in this 2-butanol reaction diagram?

[Lizzy]

Homework Statement

I have to name the particular molecule that i am looking at and fill in the blanks with that name.

Homework Equations

Choose from:
2-methoxybutane, 3-butene, 1-butene, butanal, 2-chlorobutane, ethylmethyl ether, butylmethyl ether, or 2-butanone

The Attempt at a Solution

The first thing that I did was identify the central molecule as 2-butanol, but i am no quite sure what the arrows indicate. Whether its the removal of the compound next to the arrow or the addition of it; if someone could identify the type of diagram and nudge me in the right direction that would be fantastic!

 

[Borek]

It is an orgo way of stating "something reacting with things written above arrow yielding".

 

[Lizzy]

Okay i get it thank you so much! so if i follow a) could be 1-betene, b) 2-chlorobutane, c) 2-butanone, d) 2-methoxybutane? please note that its not suppose to be Cu its suppose to be Cl! I am sorrry...

 

[Lizzy]

Or do i have b) and c) backwards in my previous answer?