Indian Politics
Sikkim was made the full fledged state of Union of India by

The 38th constitutional Amendment Act (1975)
The 36th constitutional Amendment Act (1975)
The 39th constitutional Amendment Act (1975)
The 37th constitutional Amendment Act (1975)

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Indian Politics
The parliament can legislate on a subject in the state list

for the implementation of treaties and agreements with foreign powers
All listed here
if the legislatures of two or more states recommend to the Parliament to legislate on such a subject
if the Rajya Sabha passes a resolution by two-third majority declaring the subject in state list of

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Indian Politics
What is the system of Local Self Government in the Panchayati Raj set up?

Two tier system at village and block level
Single tier set up at village level
Four tier system at the village, block, district and State level
Three tier structure at village, block and district level

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