C

To solve the matching of concepts in Column-I with their respective dimensions or definitions in Column-II, we will analyze each pair:

(i) Gravitational constant (G): The dimensions of the gravitational constant are \( M^{-1}L^{3}T^{-2} \) (indicative of how gravitational force acts between two masses).
Hence, this corresponds to (q).

(ii) Torque: The dimensions of torque are \( M L^{2}T^{-2} \) (as it is force times distance). This corresponds to (p).

(iii) Linear momentum: The dimensions of linear momentum are \( M L T^{-1} \) (mass times velocity). This corresponds to (r).

(iv) Pressure: The dimensions of pressure are \( M L^{-1} T^{-2} \) (force per unit area). This corresponds to (s).

Thus, putting it all together, we have the matches (i)-(q), (ii)-(p), (iii)-(r), (iv)-(s), which corresponds to Option C.