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Hess proposed the sea floor spreading hypothesis in which year?
A1967
B1930
C1961
D1912
Answer & Solution
Correct answer: C. 1961
1. Eruptions at ridge crests push the crust apart.
2. Hess proposed it in 1961.
3. Old ocean floor sinks at trenches.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 4, Distribution of Oceans and Continents._
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