From the given options, select the word that correctly substitutes the expression-

“A person unable to pay his debts”

Bankrupt

The word that correctly substitutes the expression "a person unable to pay his debts" is bankrupt.

• Debtor is a person who owes money to another person or organization.
• Creditor is a person or organization to whom money is owed.
• Cashier is a person who handles money in a store or bank.

A bankrupt is a person who is unable to pay his or her debts. The word comes from the Italian word "banco rotto," which means "broken bench." This is because in the Middle Ages, merchants who could not pay their debts were forced to sit on a broken bench in the marketplace as a sign of their failure.