If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity ?

If P, Q and R are physical quantities having different dimensions, which of the following combinations can never be a meaningful quantity ?

If P, Q and R are physical quantities, having different dimensions, which of the following combination can never be a meaningful quantity?

If P, Q and Rare physical quantities having different dimensions, which of the following combinations can never be a meaningful quantity?

If P,Q, R are physical quantities having different dimensions which of the following can never be a meaningful quantity?

The physical quantities not having same dimensions are

The physical quantities not having same dimensions are

The physical quantities not having same dimensions are

The physical quantities not having same dimensions are