Question

Each of the following is part of your innate immune system, except:

A Stomach acid
B White blood cells
C Skin
D Mucus

Answer 1

B. White Blood Cells

Step-by-step explanation:

I missed the word innate for a sec there, but then I looked up whether stomach acid is part of the immune system at all and realized my mistake.

The innate immune system is the part of the immune system one is born with, and we're not born with white blood cells. Those build up over time as we are exposed to pathogens.

Have a great day!