Polar frontal theory is associated with

• Origin of trade wind tract

• Origin of tropical cyclones

• Origin of tornadoes

• Origin of Jet Stream

Which of the following types of clouds occupy the lowest layer 

• Stratus

• Cumulus

• Cumulonimbus

• Cirrus

The ocean current Benguala is noticed in

• Pacific ocean

• Indian ocean

• Atlantic ocean

• Arctic ocean

Th term "Pangea" was coined by

• Alfred Weegener

• A.N.Strahler

• Sharp

• W.M. Smith

V-shaped valley is formed during the 

• Mature stage of glacial erosion

• Old age of fluvial of erosion

• Yothful stage of fluvial cycle of erosion

• Old age of arid cycle

Atoll is one of the stages of

• A natural reservoir

• A pressure system

• A coral development

• Development of the carbon sink in the ocean

The concept  "landscape is a function of structure , process and stage" was evolved by

• Griffith Taylor

• Davis

• Penck

• Thornbury

Potection plume is the result of

• A regional wind caused by a pressure gradient

• Unequal distribution of temperature

• Abnormalities caused by latent heat of condensation

• Interaction among different types of air masses

Acid rain is caused by

• Excess CO₂ in the atmosphere 

• Washout of Sulfuric acid by precipitation

• Excess in greenhouse gases emission from tropical forests

• Abnormal variations in composition of gases in the atmposphere.

ASSERTION (A) : The river valleys are usually narrow shaped in the youthful stage.

REASON (R) : Pothole drilling is a dominant erosional process responsible for down cutting of river valleys.

• Both (A) and (R) are true and (R) is the correct explanantions of (A).

• Both (A) and (R) are true but (R) is not the correct explanantions of (A).

• (A) is true but (R) is false

• (A) is false but (R) is true.