The correct answer is: None of the above.
Ajitnath was the first Tirthankara of the present age, the Avasarpini. He was born in the city of Ayodhya, in the kingdom of Kosala, to King Siddhartha and Queen Trishala. He was married to Yashoda and had a son named Pratiharn.
Ajitnath renounced his kingdom and family at the age of 30 to pursue a life of asceticism. He attained enlightenment under a banyan tree at the age of 35 and taught his disciples for 30 years. He attained nirvana at the age of 65.
Mahavir was the 24th Tirthankara of the present age, the Avasarpini. He was born in the city of Kundalpur, in the kingdom of Magadha, to King Siddhartha and Queen Trishala. He was married to Yashoda and had a son named Pratiharn.
Mahavir renounced his kingdom and family at the age of 30 to pursue a life of asceticism. He attained enlightenment under a sal tree at the age of 35 and taught his disciples for 30 years. He attained nirvana at the age of 72.
Siddhartha Gautama was the founder of Buddhism. He was born in the city of Lumbini, in the kingdom of Kapilavastu, to King Suddhodana and Queen Maya. He was married to Yashodhara and had a son named Rahula.
Siddhartha renounced his kingdom and family at the age of 29 to pursue a life of asceticism. He attained enlightenment under a bodhi tree at the age of 35 and taught his disciples for 45 years. He attained nirvana at the age of 80.
Siddhartha Gautama is not considered to be an incarnation of Ajitnath.