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The length of the perpendicular drawn from the point `P(a , b , c)` from z-axis is a. `sqrt(a^2+b^2)` b. `sqrt(b^2+c^2)` c. `sqrt(a^2+c^2)` d. `sqrt(a^2+b^2+c^2)`

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The length of the perpendicular drawn from the point` P(x, y, z)` from z-axis is given by `sqrt(y^2+x^2)`
Thus, the length of the perpendicular drawn from the point `P(a, b, c)` from z-axis is `sqrt(a^2+b^2)`
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