A. spark plug
B. Engine oil
C. Air cleaner
D. Battery
Correct Answer: Option B
B. Engine oil
Explanation
The engine oil of a tractor requires daily checking. Therefore, choice B is correct
A. spark plug
B. Engine oil
C. Air cleaner
D. Battery
Correct Answer: Option B
B. Engine oil
Explanation
The engine oil of a tractor requires daily checking. Therefore, choice B is correct
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