An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics which of the following organisms is it likely to be ?

A. Escherichia coli
B. Klebsiella pnemoniae
C. Proteus miribilis
D. Pseudomonas aeruginosa

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