The correct answer is A. The price value of a basis point (PVBP) estimates the change in the full price of a bond for a 1 basis point (bp) change in yield-to-maturity. It is calculated as:

$PVBP = -\text{Modified Duration} \times 0.0001 \times \text{Full Price}$

Substituting the given values:

$PVBP = -6.2 \times 0.0001 \times 103.50 = 0.06417 \approx 0.0642$

• Option B is incorrect because it represents a 10 bp change in yield ($-6.2 \times 0.001 \times 103.50 = 0.642$).
• Option C is incorrect because it represents a 100 bp (1%) change in yield ($-6.2 \times 0.01 \times 103.50 = 6.42$).