To solve this problem, we must match the countries in Group I with the plate tectonic features in Group II that cause seismic activity.
Iceland, known for its volcanic activity, is located on the Mid-Atlantic Ridge, which is a \(3\) Mid-Oceanic Ridge. This ridge is an underwater mountain range formed by plate tectonics, where new oceanic crust is created.
Indonesia is situated on the Pacific Ring of Fire and experiences numerous earthquakes due to the presence of a \(1\) Subduction Zone. This is where one tectonic plate moves under another, causing significant seismic activity.
Nepal, located in the Himalayas, experiences seismic activity primarily due to \(4\) Continental Collision. It lies at the boundary where the Indian plate collides with the Eurasian plate.
New Zealand lies along the boundary between the Pacific and Indo-Australian plates, where a \(2\) Transform Fault exists. The Alpine Fault, in particular, is a transform fault that contributes to its seismicity.
Based on the matching above, the correct answer is: P-3, Q-1, R-4, S-2.