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A rolled steel flat designated as 50 ISF 8 means

[A].	the flat is 50 mm long and 8 mm thick	[B].	the flat is 50 mm wide and 8 mm thick
[C].	the flat has cross-section 50 sq mm and width 8 mm	[D].	the flat has cross-section 50 sq. mm and depth 8 mm

Answer: Option B