Correct option is B
An astable multivibrator is a type of oscillator circuit that continuously switches between two states, neither of which is stable. These states are referred to as quasi-stable states because the circuit does not remain in either state for a long period; it continuously transitions back and forth between them.
• A monostable multivibrator has one stable state and one quasi-stable state. It returns to its stable state after a fixed period when triggered.
• A bistable multivibrator has two stable states and can remain in either state indefinitely until an external trigger causes it to switch states.
• Therefore, the correct answer is (b) two quasi-stable states.
