What are platelets?

I - They are actually fragments of a large cell and a huge nucleus (megakaryocyte).
II - They have a lifespan of around 10 days.
III - They are smaller than red blood cells.
IV - They have no nucleus.
V - They have many granules filled with coagulation proteins in the cytoplasm.
VI - Inactive platelets are small and have a smooth membrane.
VII - Tissue injury releases substances that activate platelets.
VIII - When activated, they increase in size, their membrane becomes rough, and they begin to release secretion granules.
a) I, II, III, IV, V, VI, VII and VIII are correct.
b) I, II, III, IV, V and VI are correct.
c) II, III, IV, V, VI, VII and VIII are correct.
d) I, II, III, IV, VI and VII are correct.
e) II, III, IV, V and VIII are correct.