बिंदु (3, 4, 5) से रेखा \(\frac{x}{1}=\frac{y-1}{2}=\frac{z-2}{3}\) तक खींचे गए लंब की लंबाई क्या है?

1
\(\frac{\sqrt{21}}{7}\)
2
\(\frac{3 \sqrt{21}}{7}\)
3
\(3 \sqrt{21}\)
4
\(\frac{3}{7}\)

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