"Sagar Matha" meaning "Mother of the Sea" is the Nepali name for Mount Everest, the highest peak in the world. Step 1: Significance of the name
It reflects the mountain's towering presence above all other peaks and its snow cover appearing like the sea. Step 2: Other options
Other peaks have distinct local names and significance but are not known as Sagar Matha.
Hence, option (C) is correct.