· Distance between hurdle B and hurdle F is 58m.

· Hurdle D is adjacent to a double layered hurdle and distance between them is 13m.

· Distance between hurdle A and B is 10m less than the distance between hurdle F and end point.
· Hurdle A is not less than 10m apart from the starting pointing.

Here, we see that case 2 will be invalid as distances between B and C and between C and D will be same and this is not possible. Distance gets on increasing in the same order from left to right. Hence, it will be eliminated.

· Distance gets on increasing in the same order from left to right.

· Difference between the distances between hurdles D and E, hurdles E and F and hurdle F and the end point is same.

· There is a distance of 33m between two double layered hurdles which is not A.

The distance between hurdle B and hurdle E is 40m. Hence, 'a' is the correct option.