What distinguishes NOD-like receptors (NLRs) from Toll-like receptors (TLRs)?

• A
  NLRs are located in the cell membrane while TLRs are in the cytoplasm.
• B
  NLRs recognize a wider variety of pathogens than TLRs.
• C
  NLRs are located in the cytoplasm, while TLRs are in the cell membrane.
• D
  NLRs are solely responsible for cytokine production.