The correct answer is (d) Share of Excise Duty from the Centre.
Excise duty is a tax levied on goods produced or manufactured within the country. It is one of the major sources of revenue for the central government. The state governments also get a share of the excise duty collected by the central government. This share is based on the population of the state.
In the case of Uttar Pradesh, the share of excise duty from the Centre is the largest source of revenue. In 2020-21, the state government received a share of Rs. 1,02,600 crore from the central government as excise duty. This was about 30% of the total revenue of the state government.
The other options are not as important sources of revenue for the state government. Land revenue is a tax levied on the ownership of land. It is a major source of revenue for the central government, but it is not as important for the state governments. Service tax is a tax levied on services provided by businesses. It is a relatively new tax, and it is not as important a source of revenue for the state governments as it is for the central government. Trade tax is a tax levied on goods that are bought and sold within the state. It is a major source of revenue for some states, but it is not as important for Uttar Pradesh as it is for some other states.
In conclusion, the largest source of revenue of U.P. Government is Share of Excise Duty from the Centre.