What are Toll-like receptors, Which type of cell carry them, and what type of reaction does this cell have upon in contact of toll-like with antigenic cells?

a) Pattern recognition receptors; B cells; Pro-inflammatory reaction
b) Cytokine receptors; T cells; Suppressive reaction
c) Sensory receptors; Macrophages; Antigen-specific reaction
d) Pathogen receptors; Dendritic cells; Immunosuppressive reaction