Questions

Pluto dwells on the inner edge of the The Kuiper belt which is a belt of asteroids that lies on the outer edge of the solar system.

Pluto is a dwarf planet that is supposed to be no longer a planet and is still considered a planet because of its history in the solar system.

It takes 248 years to make one orbit around the sun. As to where it is, depends on time.

The Mediterranean Sea seperates the continents of Europe and Africa. Tyrrhenian Sea is found between Italy and Sardinia and Aegean Sea lies between Greece and Turkey. 

China flicked the switch on the world’s largest floating solar energy plant.  The massive waterborne plant is expected to generate 40 megawatts at one time and could supply electricity for over 15,000 homes. The pioneering project, located in eastern China, is thought to cement China’s status as a top producer of solar energy in the world.  The plant has been built in Huainan city, Anhui Province, by Sungrow Power Supply, a Chinese company specialised in renewable energy.

Fifth Five Year Plan (1974–1978)

The Fifth Five-Year Plan laid stress on Employment, Poverty Alleviation (Garibi Hatao), and Justice. The plan also focused on self-reliance in agricultural production and defense.

In 1978 the newly elected Morarji Desai government rejected the plan.

The 1950 Constitution had includeed 14 languages in the 8th Schedule. Sindhi was added seventeen years later, by the Constitution Act of 1967. Three more viz, Konkani, Nepali and Manipuri were added in 1992 by the 71st Amendment Act.

Relegate means Assigning an inferior rank or position to. That means, downgrading or pulling down, lower a person.

All other options have words with opposite in meaning.

Hence, Relegate is an English word which is similar in meaning to Downgrade.