What was founded by Herb Kelleher in 1973 in Dallas, Texas, USA?

1. What was founded by Herb Kelleher in 1973 in Dallas, Texas, USA?
Northwest Airlines
Northeast Airlines
East Airlines
South West Airlines

Ans: South West Airlines

2.The dispute over Kuril Islands is among which of the following two countries?
Russia & North Korea
Russia and China
Japan & China
Russia & Japan

Ans: Russia & Japan

3.Which among the following waves are used in the gemstone industry to change white topaz into blue topaz?
X-Rays
Gamma Rays
Alpha Radiation
Beta Radiation

Ans: Gamma Rays

4. Bring out the sea which has no coastline?
White Sea
Tasmanian Sea
Sargasso Sea
Japan Sea

Ans: Sargasso Sea