To potentially grow an SIP of ₹15,000 to ₹18,000 into around ₹4 crore in 25 years, you could consider equity mutual funds with a history of consistent performance and good growth potential. For illustration, assuming an average annualized return of about 12-14%, funds like large-cap or multi-cap equity mutual funds have been known to generate such returns over the long term.

Examples (for illustration only, not direct advice): Mirae Asset Large Cap Fund, Axis Bluechip Fund, or SBI Equity Hybrid Fund. These funds have demonstrated steady growth historically.

Keep in mind actual performance depends on market conditions. It’s best to consult a financial advisor for personalized advice. For more insights on mutual funds and market trends, you can explore CNI InfoXchange's Reliable Insights and Street Calls services.