The correct option is (c) 1 and 3 only.
Explanation
Mauna Kea is a dormant volcano located in the Hawaiian Islands. In physical geography, it is frequently used to illustrate the difference between "highest altitude above sea level" and "tallest total height from base to peak."Statement 1 is Correct: Mauna Kea is located in the Pacific Ocean. It is part of the Hawaiian–Emperor seamount chain.
Statement 2 is Incorrect: Mauna Kea is not shorter than Mount Everest when measured from its base. While Mount Everest is the highest point above sea level (8,848 meters), Mauna Kea rises approximately 10,205 meters from its base on the ocean floor to its peak. Therefore, in terms of total vertical height, it is taller than Mount Everest.
Statement 3 is Correct: It is considered an undersea mountain because its base rests on the ocean floor, and the vast majority of its mass and height is submerged below the water surface.
Key Takeaway: Mount Everest is the "highest" mountain (elevation above sea level), whereas Mauna Kea is the "tallest" mountain (total vertical height from base to summit).