In general equity mutual funds give high returns in long-term, but there is a risk-factor attached to them as well.
While HDFC offers various mutual fund types, equity funds generally have the potential to provide the highest returns over the long term. However, it's important to remember that past performance doesn't guarantee future results, and equity funds also come with higher risk. It's advisable to consult with a financial advisor to determine the best HDFC MF type based on your individual risk tolerance and financial goals.