I would say that the answer would be C
<span>The placenta is the organ which supplies an infant with oxygen, nutrients, and waste excretion throughout its gestation period; this is accomplished via the umbilical cord, which serves as a conduit between the infant, at its navel, and the placenta itself, which is attached to the mother's uterine wall.</span>
Your answer is that "The solution is
either acidic or neutral."
I think the answer is b as in boy.
