Multiple choice question II — task. Mathematics State Board, Class 10.

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Consider four straight lines

(i)

$l_1 : 3y = 4x + 5$

(ii)

$l_2 : 4y = 3x - 1$

(iii)

$l_3 : 4y + 3x = 7$

(iv)

$l_4 : 4x + 3y = 2$

Which of the following statement is not true?

$l_1$ and $l_3$ are perpendicular
$l_2$ and $l_3$ are not parallel
$l_1$ and $l_4$ are not parallel
$l_2$ and $l_4$ are not perpendicular

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