Identify the grammatical case (Karak) of the underlined source word in: "Ganga Himalaya se nikaltee hai." (The Ganges originates from the Himalayas.)

The prepositional marker 'se' ($\text{से}$) here implies origin and spatial separation (dislodging or flowing away from a fixed point). In Hindi grammar, any separation or point of origin maps directly onto the Apadan Karak (अपादान कारक).