Answer:
B. 105 days of accrued interest
Step-by-step explanation:
The purchase on Thursday, October 12th will settle on Monday, October 16th - 2 business days after trade date.
Accrued interest on corporate bonds is based on a 30days per month/360 day year.
And interest starts accruing from the day of the last interest payment, up to, but not including, settlement.
See below for day calculation
July 30 days
August 30 days
September 30 days
October 15 days (up to but excluding settlement)
Total 105 days