The line $lx + my - n = 0$ will be tangent to the ellipse $\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1$, if
The line $lx + my - n = 0$ will be tangent to the ellipse $\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1$, if
- A
${a^2}{l^2} + {b^2}{m^2} = {n^2}$
- B
$a{l^2} + b{m^2} = {n^2}$
- C
${a^2}l + {b^2}m = n$
- D
None of these
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