During pregnancy, the major contributors to maternal weight gain include the fetus, uterus, amniotic fluid (liquor amnii), placenta, and breasts.
The largest weight gain comes from the fetus, which is the heaviest single component.
Next is the uterus, which enlarges significantly to accommodate the growing fetus.
Then comes the liquor amnii (amniotic fluid) that surrounds and protects the fetus.
Following that is the placenta, which nourishes the fetus and adds weight.
Finally, the breasts increase in size to prepare for lactation, but contribute the least among these.
So, the correct descending order of weight gain is: Fetus (D)>Uterus (A)>Liquor Amnii (C)>Placenta (B)>Breasts (E).
Therefore, option (2) is correct.