Red pigment producing bacteria is: (A) Escherichia coli, (B) Bordetella parapeussis, (C) Pseudomonas aeruginosa, (D) Serratia marcescens
Answer is D. Serratia forms characteristic pink,red or magenta non diffusible pigment called prodigosin which is optimally formed at room temperature. Ref: anantnarayan and panikers 10 th edition