Karaikkal Ammaiyar, also known as Punitavati, is a legendary figure in Tamil literature and is considered one of the 63 Nayanars, the highly revered Shaivite saints of South India. She was a devotee of Lord Shiva, making option 'C' the correct answer.

- **Karaikkal Ammaiyar: A Brief Introduction**
Karaikkal Ammaiyar was a female saint who lived during the 6th century CE in Tamil Nadu, India. She was born into a Brahmin family and later married a merchant. However, she renounced her worldly life and dedicated herself entirely to the worship of Lord Shiva. She composed numerous poems and hymns in Tamil, expressing her deep devotion and love for Shiva.

- **Devotion to Lord Shiva**
Karaikkal Ammaiyar's devotion to Lord Shiva was unparalleled. She considered Shiva not just as a deity but as her beloved and ultimate refuge. Her poems vividly describe her intense love and longing for Shiva, depicting various aspects of his divine nature and his role as the supreme lord of the universe.

- **Sacrifices and Miracles**
Karaikkal Ammaiyar's devotion was so profound that she underwent extreme physical and emotional hardships as acts of penance. She is said to have willingly sacrificed her own body parts, such as her eyes, tongue, and breasts, to offer to Lord Shiva. These acts of self-sacrifice symbolize her unwavering love and dedication to her chosen deity.

- **Transformation and Mystical Experiences**
Karaikkal Ammaiyar's devotion eventually led to her transformation into a young and beautiful woman. It is believed that Lord Shiva was pleased with her unwavering devotion and granted her the boon of eternal youth. She also had several mystical experiences, including divine visions and direct communication with Lord Shiva.

- **Legacy and Influence**
Karaikkal Ammaiyar's poems and hymns are collected in the ancient Tamil scripture called "Tirumurai." Her compositions continue to inspire and resonate with devotees of Lord Shiva even today. Her life and devotion serve as an inspiration for seekers of spirituality and exemplify the deep love and devotion one can have towards the divine.

In conclusion, Karaikkal Ammaiyar was a devoted follower of Lord Shiva, making option 'C' the correct answer. Her life and poetry continue to inspire and uphold the ideals of devotion and love in Shaivite tradition.