What could be a potential consequence of loss of B-cell function in a patient?

The correct answer emphasizes the critical role that B-cells play in the immune system. B-cells are responsible for producing antibodies, which are essential for identifying and neutralizing pathogens such as bacteria and viruses. When there is a loss of B-cell function, the body's ability to generate an adequate antibody response is severely compromised. As a result, this leads to an increased susceptibility to infections since pathogens are not effectively targeted and eliminated. Patients with impaired B-cell function may experience recurrent infections, particularly from encapsulated organisms that are typically managed by antibody-mediated opsonization and phagocytosis.

The other options reflect conditions or processes that are unrelated to B-cell function. Decreased insulin production is associated with pancreatic function (specifically the function of beta cells) rather than B-cells. Improved antibody response contradicts the effects of B-cell loss, as a loss would lead to a diminished immune response, not an improved one. Enhanced blood clotting relates to the coagulation pathway and platelets, not B-cell activity. Thus, the increase in susceptibility to infections due to impaired antibody production is the direct and correct consequence of loss of B-cell function.