Correct Answer - A
From the given data, time gap = 3 s.
We know, `v = 330 ms^(-1)`
Speed `= ("distance")/("time") to (c)`
Neglecting the time taken by the light to reach the ground because velocity of light is very large, that is, `C = 3 xx 10^(8) ms^(-1)`. On substituting the value, the height of the lightning from the ground is equal to `330 xx 3 = 990 m.`