The opposite vertices of a square are $(1, 2)$ and $(3, 8)$, then the equation of a diagonal of the square passing through the point $(1, 2)$, is
The opposite vertices of a square are $(1, 2)$ and $(3, 8)$, then the equation of a diagonal of the square passing through the point $(1, 2)$, is
- A
$3x - y - 1 = 0$
- B
$3y - x - 1 = 0$
- C
$3x + y + 1 = 0$
- D
None of these
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