Q: The first recipient was Uttam Kumar from Bengali cinema, who was honoured at the 15th National Film Awards in 1968 for his performances in Anthony Firingee and Chiriyakhana. As of 2017, Amitabh Bachchan is the most honoured actor, with four awards. Two actors -- Kamal Haasan and Mammootty -- have been honoured three times, while six actors -- Sanjeev Kumar, Mithun Chakraborty, Om Puri, Naseeruddin Shah, Mohanlal, and Ajay Devgn -- have won the award two times. Two actors have achieved the honour for performing in two languages -- Mithun Chakraborty (Hindi and Bengali) and Mammootty (Malayalam and English). The most recent recipient is Akshay Kumar, who was honoured at the 64th National Film Awards for his performance in the 2016 Hindi film Rustom.

Answer this question: which indian actor has won the most national awards?
A: Amitabh Bachchan
Explain how we arrive at this answer:
Explanation: This is the relevant information: As of 2017, Amitabh Bachchan is the most honoured actor, with four awards.