(a) Peat(b) Bituminous(c) Lignite(d) Anthracite ✅

(a) USA(b) Russia(c) Mexico ✅(d) South Africa

(a) Granite(b) Quartzite ✅(c) Ordovician(d) Slate

(a) Pteridophytes(b) Xerophytes ✅(c) Hygrophytes(d) Tropophytes

(a) Breakdown or disintegration of rocks ✅(b) Formation of soil by fine sand particles and water(c) Breaking of the surface of land by flowing water(d) Wearing down of rock surface

(a) Basalt(b) Sandstone ✅(c) Granite(d) Slate

(a) The Tropic of Cancer alone(b) The Tropic of Equator alone ✅(c) The Tropic of Capricorn alone(d) All parallel of latitude

(a) Black body radiation ✅(b) White light(c) X-rays(d) Gamma rays

(a) The Red Shift Theory(b) Relativity Theory(c) Big Bang Theory ✅(d) Titanic Theory

(a) Independent country ✅(b) Part of Yugoslavia(c) Part of Romania(d) Part of Bulgaria

(a) Porous soil(b) Loamy soil(c) Sandy soil(d) Clayey soil ✅

(a) Troposphere ✅(b) Stratosphere(c) Ionosphere(d) Exosphere

(a) Pacific ✅(b) Atlantic(c) Indian(d) Arctic

(a) Wind breaks(b) Shelter belts ✅(c) Protection belts(d) Mangroves

(a) Have weak gravitational field(b) Have intense gravitational field ✅(c) Have intense magnetic field(d) Emit black body radiation

(a) Alkaline soil ✅(b) Clayey soil(c) Sandy soil(d) Loamy soil

(a) James Jeans(b) F. Hoyle(c) Alven(d) O. Schmidt ✅

(a) 15%(b) 33% ✅(c) 43%(d) 53%

(a) Troposphere ✅(b) Ionosphere(c) Exosphere(d) Stratosphere

(a) Warm and humid ✅(b) Cool and moist(c) Warm and dry(d) Cool and dry