A) Protein
B) Limestone
C) Fat
D) Rust
Correct Answer: D
Solution :
Rust does not contain carbon, Chemical composition of rust is\[{{\operatorname{Fe}}_{2}}O{{g}_{3}}n{{H}_{2}}O\], Rusting is the term used for corrosion of Iron and its alloys Lime stone is a type of sedimentary rock and composed of Calcium Carbonate\[\left( CaC{{O}_{3}} \right)\]. Protein and Fats are complex organic compounds which contains carbon.
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