Final answer:
A 120-day promissory note issued on April 11 will mature on August 9.
Step-by-step explanation:
A promissory note is a financial instrument that represents a promise to pay a certain amount of money by a specific date. In this case, the promissory note is for 120 days, which means it will mature 120 days after the issue date.
Since the note is issued on April 11, we can count 120 days from that date to determine the maturity date. Starting from April 11, we count 120 days, which brings us to August 9. So, the correct answer is Option 2) August 9.