The correct answer is A. Equity shares.
Equity shares are the most risky type of investment because they represent ownership in a company. If the company does well, the value of the shares will increase, but if the company does poorly, the value of the shares may decrease significantly.
Preference shares are less risky than equity shares because they have a fixed dividend that must be paid before any dividends are paid to equity shareholders. However, preference shareholders do not have voting rights, so they have no say in how the company is run.
Debentures are loans that a company makes to investors. Debentures are less risky than equity shares or preference shares because investors are guaranteed a fixed interest rate on their investment. However, if the company defaults on its loan, investors may not get their money back.
Land is a relatively safe investment because it is a tangible asset that cannot be easily lost or stolen. However, the value of land can fluctuate over time, so it is important to do your research before investing in land.
In conclusion, equity shares are the most risky type of investment because they represent ownership in a company. If the company does well, the value of the shares will increase, but if the company does poorly, the value of the shares may decrease significantly.