The leader of all the Lilliputians in Gulliver's travel is an important character, he is the emperor of Lilliput. He is the one who orders the capture of Gulliver and is responsible for the tiny arrows attack. He is also the one who later befriends Gulliver and uses his help to settle disputes between the Lilliputians and their rivals, the Blefuscudians. So the correct answer is option 'C' the leader of all the Lilliputians.

The man who mounted on a stage in the story is the leader of all the Lilliputians.

Explanation:
The story being referred to is "Gulliver's Travels" by Jonathan Swift. In this story, the protagonist, Lemuel Gulliver, finds himself in a land called Lilliput after being shipwrecked. Lilliput is inhabited by tiny people who are about six inches tall. These people are called Lilliputians.

Gulliver quickly becomes a fascination for the Lilliputians due to his enormous size in comparison to them. They are amazed by his appearance and see him as a potential threat. However, Gulliver assures them that he means no harm and is not a dangerous giant.

The Lilliputians hold a grand ceremony to welcome Gulliver and show their authority and power. During this ceremony, a stage is set up, and the leader of the Lilliputians mounts it. This leader is Gulliver's primary contact and the one who represents the Lilliputian government.

The leader of the Lilliputians is an important character in the story as he interacts with Gulliver on behalf of his people. He negotiates with Gulliver, discusses various matters, and tries to establish a diplomatic relationship between Lilliput and Gulliver's home country.

In conclusion, the man who mounted on a stage in the story "Gulliver's Travels" is the leader of all the Lilliputians. He plays a crucial role in the plot by representing the Lilliputian government and interacting with the protagonist, Lemuel Gulliver.