Who among the following is a famous personality of the dance form Mohiniyattam?

The correct answer is Sunanda Nair.

Mohiniyattam is a classical dance form of India that originated in the state of Kerala. It is characterized by gentle, graceful movements and feminine expressions. Let's look at the dance forms associated with each of the personalities listed in the options:
1. Sitara Devi: She was a legendary dancer of Kathak, a classical dance form of Northern India.
2. Damayanti Joshi: She was a prominent exponent and teacher of Kathak.
3. Pandit Birju Maharaj: He was one of the most famous masters and choreographers of the Lucknow Kalka-Bindadin gharana of Kathak.
4. Sunanda Nair: She is an internationally acclaimed Indian classical dancer and a leading exponent of Mohiniyattam. She is the disciple of the legendary Mohiniyattam pioneer, Kalamandalam Kalyanikutty Amma.

Therefore, Sunanda Nair is the famous personality associated with the Mohiniyattam dance form.