Where to invest to build corpus for my sister's wedding

I want to build a corpus of Rs 5 lakh over the next 3-4 years for my sister’s wedding. I have started an SIP of Rs 5,000 in the direct plan of SBI Magnum Medium Duration Fund from June 2019. Where else can I invest?

Raj Khosla, Founder and Managing Director, Mymoneymantra.com says, "Your portfolio needs to ensure capital protection, liquidity and optimum returns. Given your requirements, your investments should be a mix of short-term and ultra short-term mutual funds, RD, FD, fixed maturity plans and gold funds. Over and above your existing investment of Rs 5,000, you should additionally opt for an RD of Rs 3,000 per month for 36 months or more and an SIP of Rs 2,000 per month in the direct plan of Kotak Gold Fund. Opt for the growth option. If you have a lump sum to invest, consider quality FMPs for a 3-year period, thus availing benefits of long term capital gains tax."

I am 53 and want to retire at 55. I recently prepaid my housing loan. I do not have any liabilities and can invest Rs 25,000-50,000 every month. I have three flats—I live in one, another is rented out, while the third is lying locked. I have about Rs 50 lakh invested in mutual funds. I also have substantial investments in post office schemes and FDs. Other than funds and stocks, what other investment options can I explore?

Jayant R. Pai, CFP and Head of Marketing, PPFAS Mutual Fund says, "You appear to be well-off, and free from any liabilities. However, despite your healthy finances, you are unwilling to invest either in stocks or mutual funds. You also desire the seemingly irreconcilable combination of maximum returns with high degree of safety. The only relatively safe option available to you is the 7.75%, 7-year Reserve Bank of India bonds. Interest is paid out every six months. There is no investment ceiling. It is also not eligible for tax deduction under Section 80C. With half-yearly compounding, the yield on the cumulative bond comes to 7.90%."