The ratio  for induction-type relay is:

The reset ratio for an induction-type relay is defined as:

For induction-type relays, the reset ratio typically falls between 0.9 to 0.95. This means that after operating, the relay resets at around 90% to 95% of its pick-up value.

Other options:

• 0.7 to 0.8: Too low for an induction-type relay, more common in other relay types.
• 0.2 to 0.4: Extremely low, not suitable for induction-type relays.
• 1: Implies that the relay resets at exactly its pick-up value, which is not practical due to hysteresis.