The correct answer is letter A
King Mithridates, was a Turk who was afraid of being murdered. He watched his father (of the same name) die. In the middle of a banquet poisoned, suffocated and died in front of his guests. The killer was never discovered.
Mithridates was 15 years old at the time. The legend goes that the young man liked to spend months surviving isolated in the forests of the region and that it was in one of these retreats that his most famous invention appeared.
The prince, fearing being murdered like his father, made it a habit to drink a very small dose of poison every day. One drop in the first week, two drops in the second, three in the third - until it reaches almost lethal doses.
One of his enemies tries to poison him with the same liquid that killed his father. The new King Mithridates survives, his body accustomed to the substance, and has the criminal executed.