附圖為血脂代謝之流程，其中之甲、乙及丙各代表何種產物？
(A)甲：low-density lipoprotein、乙：very-low-density lipoprotein、丙：chylomicron
(B)甲：high-density lipoprotein、乙： low-density lipoprotein、丙：chylomicron
(C)甲：very-low-density lipoprotein、乙：low-density lipoprotein、丙：chylomicron
(D)甲：low-density lipoprotein、乙： high-density lipoprotein、丙：chylomicron
承上題，在乙之apolipoprotein為何？