How to save tax for housewife with only rental income

My mother is a housewife, age 48. She gets a monthly rental of 50000/- Other than this she doesn't have any other income. With this her annual income becomes 6 Lakhs. She can get a direct deduction of 30% which makes the taxable income as 420000. She also gets a Property Tax deduction of lets say around 10000 which makes the taxable income as 410000. 

I understand that she can save upto 150000 under section 80C. 

Are there any other deductions she can utilize to reduce her taxable income.