Q. 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) Portland cement (1 part), clean sand and coarse aggregate (2 to 4 parts)
• (D) any one of the above