Which of the following statements is/are incorrect regarding lysosomes?
(i) Lysosomes are small vesicles which are bounded by a single membrane.
(ii) Lysosomes occur in all animal cells with the exception of red blood cells.
(iii) Lysosomes are called suicide bags because they contain hydrolytic enzymes.
(iv) The acidic conditions are maintained inside the lysosomes by pumping Na+ and K+ ions.
A(i) and (ii) only
B(ii), (iii) and (iv) only
C(iii) only
D(iv) only