Read the following sentences.
1. Digging contour field bunding horizontally
2. Gliricidia plants store nitrogen in soil
3. Crop yield is measured in T.M.C.
4. Supply of water by sprinklers is called micro irrigation
What are the correct sentences mentioned above ?
A) 1, 2, 4
B) 2, 3, 4
C) 1, 3, 4
D) 1, 4