Formation pressure for locos and wagons are respectively?

A) 3.0kg per sq (Cm) and 3.5 kg per Sq (Cm) B) 3.0kg per sq (mm) and 3.5 kg per Sq (mm) C) 3.5kg per sq (Cm) and 3.0 kg per Sq (Cm) D) 3.5kg per sq (mm) and 3.0 kg per Sq (mm)