Which of the following statement is/are correct?
(i) An element of a substance contains only one kind of atoms.
(ii) In` CO_2`, carbon and oxygen chemically combined in a fixed proportion of 3 : 8 by mass.
(iii) The constituents of the pure substances can be separated by single physical methods.
(iv) Milk is a homogeneous mixture.

Options

A. (i) and (ii)
B. (i) , (iii) and (iv)
C. Only (i)
D. (i) , (ii) , (iii) and (iv)

Answer

A