In which type of sleepers the heartwood side is kept upwards and the sapwood side downwards?

Both treated and untreated sleepers

Neither treated nor untreated sleepers

In which type of sleepers the heartwood side is kept upwards and the s

1.	In which type of sleepers the heartwood side is kept upwards and the sapwood side downwards?
A.	Treated sleepers
B.	Untreated sleepers
C.	Both treated and untreated sleepers
D.	Neither treated nor untreated sleepers
Answer» B. Untreated sleepers