The correct answer is B.

Government/Treasury bonds make use of the actual/actual day count convention. In other words, we compare the actual number of days that have elapsed since the last coupon payment date and the actual number of days between the coupon dates.

Here, the coupon dates of interest are 31 March and 30th June; we have 91 days (30 days on April, 31 in May, and 30 in June).

The number of days that have elapsed since 31st March is 12.

Thus, the accrued interest = $12/91 \times 3.125/4 = 0.1030%$

Per $100 face value, that's $0.1030.

Note: 3.125% is an annual rate, that's why we have to divide by 4 to get the quarterly (3-month) rate.

Note: Another approximate approach to the calculations would be: Accrued interest = $(12/365) \times (0.03125) = 0.1027$