Explanation:

- Karaikkal Ammaiyar: A well-known woman Nayanar saint, she is one of the earliest female poets in Tamil literature and a fervent devotee of Lord Shiva.

- Mangayarkkarasiyar: She is also a celebrated woman Nayanar saint, married to a Pandya king and known for her devotion to Shiva.

- Andal: A revered female saint and poet of Tamil Nadu, but she belongs to the group of Alvars, who were devotees of Lord Vishnu, not Nayanars who were Shaivites.

- Isaignaniyar: Recognized as a woman Nayanar saint, she was the mother of Sundarar, one of the prominent Nayanar saints.

Answer: Option 3 - Andal .

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