The integral \(\oint f\left( z \right)dz\) evaluated around the unit circle on the complex plane for \(f\left( z \right) = \frac{{\cos z}}{z}\) is

The integral \(\oint f\left( z \right)dz\) evaluated around the unit

1.	The integral \(\oint f\left( z \right)dz\) evaluated around the unit circle on the complex plane for \(f\left( z \right) = \frac{{\cos z}}{z}\) is
A.	2 π i
B.	4 π i
C.	-2 π i
D.	0
Answer» B. 4 π i