Question

feedback among logic gates make asynchronous system stable combinational complex unstable

Explanation:

In asynchronous systems, feedback among logic gates can lead to race - conditions and unpredictable behavior, making the system unstable. Combinational systems don't have feedback loops in the same sense for instability issues. Stability is not a typical outcome of such feedback in asynchronous systems. Complexity is not the most direct result compared to instability.

Answer:

unstable