Answer: B
Acinetobacter, Pseudomonas aeruginosa and Stenotrophomonas maltophilia belong to the non-enterobacteriaceae family. Proteus is not a lactose fermenter.
Reference
W J Steinbach, A K Shetty. Review: Use of the diagnostic bacteriology laboratory: a practical review for the clinician. Postgrad Med J 2001;77:148-156 doi:10.1136/pmj.77.905.148 (weblink here, free full text, see Figure 5)