If a system is said to be invertible, then?
(a) One-to-one correspondence between its input and output signals
(b) One-to-many correspondence between its input and output signals
(c) Many-to-one correspondence between its input and output signals
(d) None of the mentioned
The question was posed to me in a national level competition.
My query is from Inverse Systems and Deconvolution topic in division Frequency Analysis of Signals and Systems of Digital Signal Processing