Mezzo was promoted as Finance Director of a Hong Kong listed company in April 2019. As a senior member of staff, she was given 1.5 million share options at an exercise price of $0.20 per share exercisable within two years from 1 April 2020. The shares were trading at $0.50 on that date. The share price of the company surged recently to $1.20 per share, at which time Mezzo exercised half of the options. Her stockbroker sold the shares at an average price of $1.00 per share. How much will be included as her assessable income in respect of the share options for the year of assessment 2020/21? Select one:

a. $600,000

b. $750,000

c. $1,500,000

d. $450,000