Which of the following is correct in relation to a complying superannuation funds?

I. All taxable income in the accumulation phase is taxed at $15\%$

II$.$ Assessable contributions and taxable income in the accumulation phase is taxed at $15\%,$ and long term capital gain are taxed at $10\%$

III. earnings supporting a retirement phase pension are exempt from income tax and CGT

IV$.$ Long term Capital gains are taxed concessionally with $1/3$ discount

Question $17$Select one:

a$.$

II and III

b$.$

I and IV

c$.$

II$,$ III and IV

d$.$

I,III, and IV