In each of the following questions, four sentences are given between the sentences numbered $1$ and $6.$ You are required to arrange the four sentences so that all six together make a logical paragraph.
1. Why are horses the same?
A. It may be old and lame, and in time it will die.
B. A particular horse ‘flows’, naturally.
C. But there is something all horses have in common.
D. You probably don’t think they are at all.
6. But the ‘form’ of the horse is eternal and immutable.