Option 1: Dakhma is not related to Buddhism. Dakhma refers to a Zoroastrian tower of silence used for the disposal of dead bodies in the Parsi community.

Option 2: Chaitya is the correct answer. In Buddhism, a chaitya refers to a shrine or a sacred space where Buddhists gather for worship, meditation, and devotional practices. It is an important feature in Buddhist architecture and is often associated with stupa (a burial mound or memorial), which symbolizes the enlightened mind of the Buddha.

Option 3: Khangah is not related to Buddhism. Khangah is a term used in Persian or Iranian culture to refer to a house or place of worship for Sufi Muslims.

Option 4: Angeri is not related to Buddhism. It does not have any known association with Buddhist practices or teachings.

Therefore, the correct answer is option 2: Chaitya.