Which of the following mammalian cells are not capable of metabolizing glucose aerobically into carbon dioxide?

Which of the following is a cell fragment?

Which one of the following is correct?

$Rh$ factor is concerned with:

Which organ is considered as the "Graveyard of $RBCs$" where most of them are destroyed by macrophages?

Mature human $RBCs$ are enucleated. Which of the following is the most appropriate explanation for this?
$(i)$ They do not need to reproduce.
$(ii)$ They are somatic cells.
$(iii)$ They do not perform metabolism.
$(iv)$ Their internal space is available for $O_2$ transport.