Financial assets&liabilities – equity and debt instruments

Hi,
does anybody know why the same bonds might be considered as both debt and equity instrument or am I missing anything ?
The following is example :

On 1 January 20X1, Tokyo bought a $100,000 5% bond for $95,000, 
incurring issue costs of $2,000. Interest is received in arrears. The bond 
will be redeemed at a premium of $5,960 over nominal value on 31 
December 20X3. The effective rate of interest is 8%. 
The fair value of the bond was as follows: 
31/12/X1  $110,000  
31/12/X2  $104,000 
Required: 
Explain, with calculations, how the bond will have been
accounted for over all relevant years if: 
 
(a) Tokyo planned to hold the bond until the redemption date.
(b) Tokyo may sell the bond if the possibility of an investment
with a higher return arises.
(c) Tokyo planned to trade the bond in the short­term, selling it
for its fair value on 1 January 20X2.

Then, in explanations it is said that:
(a) refers to amortised cost
(b) and (c) FVTOCI and FVTPL respectively