Which of the following statement is correct?

• Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
• Cell communicate with one another in unicellular organisms using extracellular signaling antigen and antibody
• Cell communicate with one another in multicellular organisms using intracellular signaling molecules only
• Cell communicate with one another in unicellular organisms using intracellular signaling antigen and antibody