Adult human RBCs are enucleate. Which of the following statement(s) is/are the most appro- priate explanation for this feature?
(a) They do not reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transport
Option 1 : (b) and (c)
Option 2 : (a), (c) and (d)
Option 3 : Only (d)
Option 4 : Only (a)