1-convertibles 2-Option for shareholders

1-Convertible bonds issued by entity, when a holder converts do we :
Dr:equity reserve,Dr:Liability (in proportion liability and equity was split) , cr: equity share capital

please correct if wrong.

2-a) An entity gives option that company will buy shares at a Fair value price after 3 years.
(did the entity incurred liability along with issuing shares?) how to account for this transaction for three years

1st year:
2nd year:
3rd year (30% holder excercised)

2(b) how answer would be different if option was at fixed price instead of fair value of equity shares)

2c) if company sells that option separately at a price to shareholders .(like equity shares issued at par without option ($5), issued with option to sell back ($7)