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The usual proportion of ingredients in reinforced cement concrete is

[A].	Portland cement (1 part), clean sand (2 to 4 parts) and coarse aggregate (1 to 2 parts)	[B].	Portland cement (1 part), clean sand (1 to 2 parts) and coarse aggregate (2 to 4 parts)
[C].	Porland cement (1 part), clean sand and coarse aggregate (2 to 4 parts)	[D].	any one of the above

Answer: Option B