Which is the economically most important nematode in India?

✅Explanation:
Meloidogyne incognita, commonly known as the root-knot nematode, is considered the most economically important nematode in India due to its wide host range and severe damage to various crops. It infects a vast array of plants, including vegetables, fruits, pulses, and cash crops, leading to significant yield losses.

📌Other Options Explanations:
(a) Heterodera avenae: This is the cereal cyst nematode, primarily affecting cereal crops.
(b) Anguina tritici: This is the seed gall nematode, primarily affecting wheat.
(d) Rotylenchulus reniformis: This is the reniform nematode, which affects various crops.