Let us suppose line make intercept "a" an x-axis.
Then according to given condition, it makes intercept 2a an y-axis
i.e. equation of the line is given by
also given line passes through (1, 2)
i.e. 2(1) + 2 = 2a
i.e. 4 = 2a
i.e. a = 2
∴ equation of line is 2x + y = 4
Hence, the correct answer is option A.