This nematode is intermediate which can live entirely above ground & subterranean form also

Answer: Option D

Tylenchulus nematode is intermediate and can live entirely above ground & in subterranean form also.
Tylenchulus semipenetrans, also known as the citrus nematode or citrus root nematode, is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus. T. semipenetrans is found in most citrus production areas and diverse soil textures worldwide.
Their feeding strategy is semi-endoparasitic and has a very narrow host range among commonly grown crops. These nematodes are considered major plant-parasitic nematodes because they can because 10 - 30% losses reported on citrus trees.