The variety of coal in which the deposit contains recognizable traces of the original plant material is____________?

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Big Bang theory explains_____________?

A. Origin of Universe B. Origin of Sun C. Laws of physics D. None of above...

Periodontics deals with _____________?

A. Surgery of spine B. Stomach disorders C. Ligaments restoration D. Dentistry E. Heart attacks...

The atmospheric greenhouse effect is produced mainly by the __________________?

A. Absorption and re-emission of visible light by the atmosphere B. Absorption and re-emission of ultraviolet radiation by the atmosphere C. Absorption and re-emission of infrared radiation by the atmosphere D. Absorption and re-emission of visible light by clouds E. Absorption and re-emission of visible light by the ground...

Earthquakes are caused by:

A. Landslide B. Eruption of volcanoes C. Tectonic plates D. All of these...

Steam Turbine was introduce by ________ ?

A. C.A. Parson  B. Orwill Right C. Arkwright D. Alexander son...