Which of the following correctly describes the relationship between B-lymphocytes and T-lymphocytes?
1
B-lymphocytes secrete antibodies, while T-lymphocytes directly kill pathogens.
2
T-lymphocytes produce antibodies, while B-lymphocytes activate the immune response.
3
Both types of lymphocytes are primarily responsible for the humoral immune response.
4
B-lymphocytes and T-lymphocytes have identical roles in the immune system.