Ailment C lasts twice as long as Ailment D
Taking Medicine A halves the duration of Ailment B
Medicine C reduces the duration of Ailment D by five days
Ailment A and B last for eight days
Taking Medicine B halves the duration of Ailment A and C
Ailment B lasts half the duration as Ailment D
Taking appropriate Medicine, Ailment D lasts longer than Ailment A.

The correct answer is: True

In the question it is given that,
Ailment C lasts twice as long as Ailment D
Taking Medicine A halves the duration of Ailment B
Medicine C reduces the duration of Ailment D by five days
Ailment A and B last for eight days
Taking Medicine B halves the duration of Ailment A and C
Ailment B lasts half the duration as Ailment D
Taking appropriate Medicine, Ailment D lasts longer than Ailment A.
Here, we have find whether the given statement is true or not.
From the given statements we can say that,
a. Line 4 states that Ailment A lasts for eight days.
b. Line 6 states that Ailment D lasts for twice as long as Ailment B, thus sixteen days.
c. Line 3 states that by taking Medicine C, the duration of Ailment D will be reduced by five days.
So, it'll be eleven days.
d. Line 5 states that Medicine B will half the duration of Ailment A; .
Thus, it is correct that on taking appropriate Medicine, Ailment D lasts longer than Ailment A.
Therefore, the conclusion is true.