X Winnowing |
Y-Threshing |
Z- Sieving |
A) Only X
B) Only Y, Z
C) Only Z, X
D) X, Y and Z
Correct Answer: B
Solution :
Only winnowing (X) needs air for the process of separation. While threshing (Y) and sieving (Z) do not need air while they are carried out.You need to login to perform this action.
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