What is the fracture toughness of alumina in MPa‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇm?$

What is the fracture toughness of alumina in MPa‚Äö√Ñ√∂‚�

1.	What is the fracture toughness of alumina in MPa‚Äö√Ñ√∂‚àö‚Ä†‚àö‚àÇm?$
A.	1.26
B.	1.76
C.	1.86
D.	1.98
Answer» C. 1.86