PrRh2B2C remains paramagnetic down to 0.5 K without any signature of magnetic ordering. The low temperature heat capacity revealed a very high value of the Sommerfeld coefficient, γ = 250 mJ/mole K2, characterizing PrRh2B2C as a heavy fermion (HF) system. However, there is no Kondo behavior and the resistivity reflects a normal metallic behavior except at low temperatures where a signature of non Fermi liquid behavior is observed as a T1.5 temperature dependence. The analysis of heat capacity data suggests a singlet ground state in this compound. The presence of a singlet ground state suggests that the heavy HF in PrRh2B2C results from the interaction of the conduction electrons with the low-lying CF excitations. A similar mechanism of excitonic mass enhancement was proposed in PrOs4Sb12. It would be of interest to investigate the magnetic ordering in PrRh2B2C using muSR study.