Answer:
b. As paid-in capital from treasury stock transactions.
Step-by-step explanation:
No gain is recognize when selling stock, as this represent contribution to the company from the stockholders. This is not a gain for the company is just a contribution.
The treasury stock will be write-off, cash will be debited for the amount received and then, any difference will be settle by debiting or crediting the paid-in capital from Treasury Stock.