How to invest 27L my dad got

My dad is currently a salaried employee, he might retire in the coming 1-2 years. He currently earns around 40 lpa in a T1 city, and he asked me for suggestions invest/park 27L he received recently. My mom suggests FD, but real inflation being higher than current rates, it makes no sense according to me. Other options are stocks/bonds/house. But we are not entirely sure how to allocate the money. Any and all suggestions will be helpful.