Four people are talking about Lao Tian's deposit. A said, Lao Tian has a deposit of at least 5,000 yuan. B said, No, there is at least ten thousand yuan. C said, his savings is less than twenty thousand. Ding said, there is at least one hundred yuan in Lao Tian's passbook. In fact, only one of them is right.
?
Lao Tian's deposit is less than 100 yuan