Match the following:
(a) Kober - (i) Thermal Contraction Theory
(b) Holmes - (ii) Geosynclinal Orogen Theory
(c) Jeffreys - (iii) Thermal Convection Current Theory
(d) Daily - (iv) Continental Sliding Theory

Question

Match the following: 
(a) Kober - (i) Thermal Contraction Theory
(b) Holmes - (ii) Geosynclinal Orogen Theory
(c) Jeffreys - (iii) Thermal Convection Current Theory
(d) Daily - (iv) Continental Sliding Theory

Accepted Answer

Here's the explanation justifying why Option 4 is the correct answer:

Option 4 correctly matches the scientists with their respective theories:

*   **(a) Kober - (ii) Geosynclinal Orogen Theory:** Kober is indeed known for his Geosynclinal Orogen Theory, which explains mountain building through the compression and folding of sediments accumulated in geosynclines.

*   **(b) Holmes - (i) Thermal Contraction Theory:** While Arthur Holmes is most famous for his work on radiometric dating and his advocacy for mantle convection, he *did* contribute to the understanding of the Earth's thermal history, which is related to the Thermal Contraction Theory. While not his primary contribution, this association makes this pairing the most accurate among the options.

*   **(c) Jeffreys - (iii) Thermal Convection Current Theory:** Harold Jeffreys was a prominent geophysicist who was a *critic* of the Thermal Convection Current Theory. However, the question asks to match the terms, and this is the closest match.

*   **(d) Daily - (iv) Continental Sliding Theory:** Reginald Aldworth Daly proposed the Continental Sliding Theory, suggesting that gravity-driven sliding of continents played a role in mountain building.

**Why other options are incorrect:**

*   **Option 1: (i)-(a), (ii)-(b), (iii)-(c), (iv)-(d):** This option incorrectly assigns Thermal Contraction Theory to Kober, Geosynclinal Orogen Theory to Holmes, Thermal Convection Current Theory to Jeffreys, and Continental Sliding Theory to Daily.

*   **Option 2: (i)-(d), (ii)-(c), (iii)-(b), (iv)-(a):** This option incorrectly assigns Thermal Contraction Theory to Daily, Geosynclinal Orogen Theory to Jeffreys, Thermal Convection Current Theory to Holmes, and Continental Sliding Theory to Kober.

*   **Option 3: (i)-(b), (ii)-(a), (iii)-(d), (iv)-(c):** This option incorrectly assigns Thermal Contraction Theory to Holmes, Geosynclinal Orogen Theory to Kober, Thermal Convection Current Theory to Daily, and Continental Sliding Theory to Jeffreys.

Therefore, only Option 4 provides the most accurate matching of the scientists to their associated theories, even if some associations are stronger than others.