Arrange the following layers of flexible pavement from top to bottom :
(a) Sub-base course
(b) Base course
(c) Surface course
(d) Sub-grade
1
(c), (a), (d), (b)
2
(c), (b), (d), (a)
3
(c), (a), (b), (d)
4
(c), (b), (a), (d)
Arrange the following layers of flexible pavement from top to bottom :
(a) Sub-base course
(b) Base course
(c) Surface course
(d) Sub-grade