in charpy test, specimen with Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â notch is used

in charpy test, specimen with Â Â Â Â Â Â Â Â Â Â�

1.	in charpy test, specimen with Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â notch is used
A.	key hole
B.	u
C.	v
D.	all of the above
Answer» E.