Im confuse with the right answer here. Can anyone help?

Which of the following statements regarding mixtures and compounds is incorrect?

A The composition of a mixture may vary while the components of a pure compound are present in fixed proportions
B Both may contain elements
C A mixture is formed by a chemical reaction whereas a compound is not.
D A mixture can usually be separated by physical means whereas a compound by chemical means

Question

Im confuse with the right answer here. Can anyone help?

Which of the following statements regarding mixtures and compounds is incorrect?

A	The composition of a mixture may vary while the components of a pure compound are present in fixed proportions
B	Both may contain elements
C	A mixture is formed by a chemical reaction whereas a compound is not.
D	A mixture can usually be separated by physical means whereas a compound by chemical means

anonymous · Answer

i think i go with D

vincent-lyon.fr · Answer

C is incorrect: a compound is made by a chemical reaction between elements.