A risk which is classified as its contribution to risk of portfolio is classified as

classified risk
contributed risk
irrelevant risk
relevant risk

The correct answer is D. relevant risk.

A relevant risk is a risk that has the potential to affect the value of a portfolio. It is classified as such based on its contribution to the overall risk of the portfolio.

A classified risk is a risk that has been identified and categorized. It is not necessarily a relevant risk.

A contributed risk is a risk that has contributed to the loss of a portfolio. It is not necessarily a relevant risk.

An irrelevant risk is a risk that does not have the potential to affect the value of a portfolio. It is not classified as a relevant risk.