The fractional hole area Fh, is defined as?

1.	The fractional hole area Fh, is defined as?
A.	(Hole diameter/hole pitch)<sup>2</sup>
B.	K‚Äö√Ñ√∂‚àö√ë‚àö¬• (hole pitch)<sup>2</sup>
C.	K‚Äö√Ñ√∂‚àö√ë‚àö¬• (hole diameter/hole pitch)<sup>2</sup>
D.	(Hole diameter) <sup>2</sup>
Answer» D. (Hole diameter) <sup>2</sup>

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