A B cell deficiency would most likely lead to which condition?

A B cell deficiency primarily impacts the body's ability to produce antibodies, which are crucial for identifying and neutralizing pathogens such as bacteria and viruses. B cells, a type of white blood cell, are essential components of the adaptive immune system, responsible for humoral immunity. When there is a deficiency in B cell function or number, the body's ability to generate appropriate immune responses is significantly compromised.

This deficiency leads to an increased susceptibility to infections, particularly from encapsulated bacteria and viruses. Individuals with B cell deficiencies typically experience recurrent infections because their immune system lacks the necessary antibodies to combat these pathogens effectively. Therefore, the condition linked to a B cell deficiency is increased infections, as the immune system's defense mechanisms are hindered by the inability to produce sufficient antibodies.

While autoimmune disorders can involve B cells, they are not a direct result of B cell deficiency; rather, they typically occur when B cells behave inappropriately. Decreased antibody production would indeed happen as a direct consequence of B cell deficiency, but it is more specific than the broader consequence of increased infections. Increased blood clotting is unrelated to B cell function and is not a result of their deficiency, making it an incorrect choice in this context.