Which of the following minerals is essential for the proper functioning of the immune system, particularly in the activation of T-lymphocytes?

A Zinc
B Iron
C Copper
D Selenium
Zinc plays a crucial role in the immune system, particularly in the activation of T-lymphocytes, which are vital for cell-mediated immunity.
Journal of Nutrition and Immunology
Minerals and Trace Elements Immunology and Nutrition Immune System and Minerals Easy MEDICAL Confidence: high