The correct answer is option 'B) 99'.

To understand this answer, we need to analyze the statement given in the question. The state astrologer predicted that no harm would come to the Tiger King until the killing of a certain number of tigers. Let's break down the statement and analyze it step by step.

**1. The state astrologer predicted:**
The statement is based on a prediction made by the state astrologer. Astrologers are individuals who claim to have the ability to predict future events based on the positions and movements of celestial bodies like stars and planets. They often use various astrological techniques and calculations to make predictions.

**2. No harm would come to the Tiger King:**
According to the astrologer's prediction, the Tiger King would not experience any harm. This implies that the Tiger King would be safe and protected from any danger or negative events.

**3. Till the killing of ___ tigers:**
The astrologer's prediction is related to the killing of a specific number of tigers. The question asks us to determine the correct number of tigers mentioned in the prediction. The options provided are 89, 99, 79, and 100.

**4. Correct answer:**
The correct answer is option 'B) 99'. This means that the astrologer predicted that no harm would come to the Tiger King until he killed 99 tigers.

It's important to note that this prediction is based on the assumption that the Tiger King would continue to kill tigers. If the Tiger King stops killing tigers before reaching the specified number, the prediction may no longer hold true.

This question seems to be based on a fictional scenario, as killing tigers is illegal in many countries and protected under wildlife conservation laws. It is essential to respect and protect endangered species rather than engaging in harmful activities like poaching or hunting.