Statements-I: Theory of Plate tectonics was given by H.H. Hess in 1967.
Statements-II: Theory of Plate Tectonics is based on Theory of seafloor spreading.
Correct Answer: (d) Statements-I is true but Statements-II is true
Note: The concept of plate tectonics was formulated in the 1960s. Wilson, Morgan, Parker, Mckenzie, Harry Hess etc. con- tributed to the development of this theory. The theory of plate tectonics is based on the ocean floor spreading theory.