Concept: The part labelled II is a scraper attached to a disc plough.Explanation: A disc plough has a concave disc that cuts and turns the soil.During ploughing, soil often sticks to the disc surface.The scraper, labelled II, continuously removes this adhering soil from the disc.This prevents clogging and keeps the disc working effectively.It does not make cuts or roll over obstacles.Answer: D. remove soil from the disc
