Between which values does the frontal gap‚Äö√Ñ√∂‚àö√ë‚àö¬•s surface roughness vary?$

Between which values does the frontal gap‚Äö√Ñ√∂‚àö√�

1.	Between which values does the frontal gap‚Äö√Ñ√∂‚àö√ë‚àö¬•s surface roughness vary?$
A.	0.02 to 0.13 ¬¨¬®¬¨¬µm
B.	0.30 to 1.90 ¬¨¬®¬¨¬µm
C.	1.93 to 2.64 ¬¨¬®¬¨¬µm
D.	2.73 to 4.26 ¬¨¬®¬¨¬µm
Answer» C. 1.93 to 2.64 ¬¨¬®¬¨¬µm