The correct answer is: D. Zila Parishad receives fixed grants from State Government.
Zila Parishad is a local government institution in India at the district level. It is responsible for a wide range of functions, including education, health, agriculture, and rural development. Zila Parishads are funded by the state government, which provides them with fixed grants. In addition, Zila Parishads can also generate their own revenue through taxes and fees.
Option A is incorrect because Zila Parishads can charge taxes on local markets. In fact, they are one of the main sources of revenue for Zila Parishads.
Option B is incorrect because Zila Parishads do not get a share of their income from Gram Sabhas. Gram Sabhas are village-level self-government institutions, and they are responsible for their own finances.
Option C is incorrect because the Central Government does not provide grants in aid from the land revenue it collects from every state to Zila Parishads. The Central Government does provide grants to Zila Parishads, but these grants are not based on land revenue.
Therefore, the correct answer is: D. Zila Parishad receives fixed grants from State Government.