Which of the following will have a meso-isomer also?

A meso compound must have at least two chiral centers and a plane of symmetry.2,3-dichlorobutane has two identical chiral centers ($C_2$ and $C_3$ both bonded to $\text{H},\text{Cl},{\text{CH}}_3,$ and the other chiral group). The $(2R,3S)$ configuration has a plane of symmetry, making it a meso isomer.2,3-dichloropentane has non-identical chiral centers, so no meso form is possible.