In 1920, which of the following changed its name to Swarajya Sabha?

Which of the following events happened earliest?

Which of the following is/are the possible consequences of heavy sand mining in riverbeds?
1. Decreased salinity in the water
2. Solution of groundwater
3. Lowering of the water table

Select the correct answer using the codes given below.

With reference to agriculture soils, consider the following statements?
1. A high content of organic matter drastically reduces its water holding capacity.
2. Soil does not play a role in the sulphur cycle.
3. Irrigation of a period of time can contribute to the salinization of some agriculture lands.
Which of the following statements given above is/are correct?

The partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards a greener and more inclusive economy, emerged at:

3D Printing has applications in which of the following?
1. Preparation of confectionery items.
2. Manufacture of bionic cars.
3. Automotive industry.
4. Reconstructive surgeries. 
5. Data processing Technologies.
Select the correct answer using the codes given below:

Consider the following statements:
1. The Barren Island volcano is an active volcano located in the Indian territory.
2. Barren Island lies about $140 km$ East of Great Nicobar.
3. The last time of barren Island volcano erupted was in $1991$, and it has remained inactive since then.
Which of the following statements given above is/are correct?

Why is a plant called Prosopis juliflora often mentioned in the news?

Consider the following statements:

$1$. Most of the world's coral reefs are in tropical waters.

$2$. More than one-third of world coral reefs are located in Australia, Indonesia, and the Philippines.

$3$. Coral reefs host far more animal species than those hosted by tropical rainforests.

Which of the following given above is/are correct?