The correct answer is: A. Tara
Sumtinath Tirthankara was born from the womb of Tara, the wife of King Shanti. Tara was a beautiful and virtuous woman who was devoted to her husband and children. She was also a devout Jain and followed the teachings of the Tirthankaras.
Tara was pregnant with Sumtinath for 12 years. During this time, she was visited by many sages and saints who predicted that her son would become a great Tirthankara. Tara gave birth to Sumtinath in a cave in the Himalayas.
Sumtinath was a perfect child who was free from all attachments and desires. He renounced the world at the age of 30 and became a monk. He spent the next 60 years wandering the countryside, preaching the Jain faith and teaching others how to achieve liberation.
Sumtinath attained moksha (liberation) at the age of 90. He is the 17th Tirthankara of the Jain faith.
The other options are incorrect because they are not the names of the mothers of Sumtinath Tirthankara.
Option B: Marudevi is the mother of Parshvanatha Tirthankara.
Option C: Vijaya is the mother of Mahavira Tirthankara.
Option D: Sumangla is the mother of Neminatha Tirthankara.