Subject: mathqa
Question: the diameter of a circle is 4 / π . find the circumference of the circle .
Option: 
A: 4 π', 'c ) 4', 'd ) 6', 'e ) 5']
B: 8', 'b ) 4 π', 'c ) 4', 'd ) 6', 'e ) 5']
C: 5']
D: 6', 'e ) 5']
Answer: B