The correct option is: (d) peritrichous.
Explanation:
Peritrichous bacteria have flagella distributed over the entire cell surface (e.g., E.coli.). Monotrichous bacteria have a single polar flagellum at one end of the cell (e.g., Vibrio cholerae), amphitrichous bacteria has two flagella (also two groups of flagella), one at each end. and lophotrichous bacteria is with a tuft of several flagella at one end of the cell (e.g., Spirillum serpens ).
