Bisected pearls appearance on culture medium is seen in ?
Ans. is 'b' i.e., Bordetella Bordetella are gram-negative, capsulated, fimbriated, nonmotile coccobacillus.They show bipolar metachromatic granules on staining with toluidine blue.
Brucella
Bordetella
Haemophilus ducreyi
Pseudomonas