Which of the turing machines have existential and universal states?
(a) Alternating Turing machine
(b) Probalistic Turing machine
(c) Read-only turing machine
(d) None of the mentioned
I had been asked this question by my school teacher while I was bunking the class.
This intriguing question comes from Multitape Turing Machines in section Introduction to Turing Machines of Automata Theory