The correct answer is: a) Income tax
Income tax is a major source of tax revenue for the Sikkim government. It is a tax on the income of individuals and businesses. The income tax rate in Sikkim is progressive, which means that the higher your income, the higher your tax rate.
Excise duty on alcohol is another major source of tax revenue for the Sikkim government. Excise duty is a tax on goods that are considered to be harmful or luxurious, such as alcohol and tobacco. The excise duty rate on alcohol in Sikkim is relatively high, which helps to generate significant revenue for the government.
Corporate tax is a tax on the profits of businesses. The corporate tax rate in Sikkim is relatively low, which makes it an attractive place for businesses to operate. However, corporate tax is not a major source of tax revenue for the Sikkim government.
Property tax is a tax on the value of real estate. The property tax rate in Sikkim is relatively low, which makes it an attractive place to own property. However, property tax is not a major source of tax revenue for the Sikkim government.
In conclusion, income tax is the major source of tax revenue for the Sikkim government. Excise duty on alcohol is another major source of tax revenue. Corporate tax and property tax are not major sources of tax revenue for the Sikkim government.