A rocket with a lift off mass 20,000 kg is balanced with a net initial acceleration of 5 $m/s^2$, then the initial thrust of the blast is

Question

$\begin{array}{1 1} (a)\; \text{$3 \times 10^7$ newtons approx} \\ (b)\; \text{$3 \times 10^6$ newtons approx} \\ (c)\; \text{$3 \times 10^5$ newtons approx} \\ (d)\; \text{$3 \times 10^4$ newtons approx} \end{array}$