Answer: (Detailed Solution Below)
Option A: Union excise duties and corporate tax
Detailed Solution:
The correct answer is “Union excise duties and corporate tax”.
The 5 major sources of revenue for the Government are: Goods and Services Tax (GST), Income tax, Corporation tax, Non-tax revenues, Union excise duties.
While the tax landscape has evolved with the introduction of GST, historically, Union Excise Duties and Corporate Tax have been the two primary sources of tax revenue for the Central Government of India.