In the CGS system of units, the universal gravitational constant is equal to:

Concept: The universal gravitational constant is the gravitational force between two bodies of unit mass separated by a unit distance.

The universal gravitational constant has the same value everywhere in the universe.

In the SI system, the universal gravitational constant has the value 6.67 x 10^-11 Nm²/kg².

Universal gravitational constant in the CGS unit system:

$1\mathrm{N} = {10}^5 \mathrm{dyne}$

$1\mathrm{kg}= 1000\mathrm{g}$

$1\mathrm{m}= 100\mathrm{cm}$

Substituting the values,

$\mathrm{G}=\frac{6.67 \times {10}^{-11 }\times {10}^5 \times {10}^2 \times {10}^2}{ {10}^3 \times {10}^3} = 6.67\times {10}^{-8} \mathrm{dyne} {\mathrm{g}}^{-2} {\mathrm{cm}}^2$

Hence, option 2 is correct.