The Khukuri Naach, a Nepali dance, involves the use of:

Traditional curved knives (khukuri)
Swords and shields
Drums and cymbals
Long bamboo poles

The correct answer is: a) Traditional curved knives (khukuri).

The khukuri is a traditional Nepalese knife with a curved blade. It is used for a variety of purposes, including combat, hunting, and everyday tasks. The khukuri is also a symbol of Nepalese culture and identity.

The Khukuri Naach is a traditional Nepali dance that involves the use of khukuris. The dancers perform a series of acrobatic feats and swordplay maneuvers while wielding the knives. The dance is a display of strength, skill, and courage.

The other options are incorrect because they do not involve the use of khukuris. Option b) is incorrect because swords and shields are not used in the Khukuri Naach. Option c) is incorrect because drums and cymbals are used to accompany the dance, but they are not used in the dance itself. Option d) is incorrect because long bamboo poles are not used in the Khukuri Naach.