Which of the following has the highest compressive strength ?

A. Copper
B. Cast iron
C. Steel
D. Monel metal

A. High carbon steel
B. Wrought iron
C. Mild steel
D. None of these

A. Lead lined stainless steel
B. Cast iron
C. Steel or cement-brick lined
D. Hard wood

A. High speed
B. Silicon
C. Molybdenum
D. Tungsten

A. Caustic soda
B. Chlorinated brine
C. Hypochlorous acid
D. All A., B. and C.

A. 0.5
B. 2.2
C. 2.5
D. 2.8