sole trader

Hi Mr MIke ,

One of the questions of practice test in opentuition says :

Jasmine runs her own shoe shop “Jasmine shoe Limited” ,which statement best describe the extent of Jasmine’s liability of her business,

I chosen that

There is no limit to her liability

but the correct answer is

Her liability is limited to the value of shares yet unpaid ,

How is that

Isn’t it the sole trader is totally liable for her own business ,

Please clarify

Thanks,