Which statement is true about the meaning of the equation

a.
the fraction is the size of 5.

b.
the fraction is the size of 5.

c.
the number 5 is 2 times the size of .

d.
the number 2 is 5 times the size of .

An equation says that two things are equal. It will have an equals sign (assuming you know what that is)  like this:
7+2=10-1
What the equal says on the left, is equal to the answer on the right. 
Basically, it's a statement saying "equals that"

I don't fully understand your question, but I hope it helped you at least a little.