I can barely build the computer for that budget, to expect to include a monitor, keyboard and mouse as well is just not reasonable.
PCPartPicker part list:
https://in.pcpartpicker.com/list/9fbQNN
Price breakdown by merchant: https://in.pcpartpicker.com/list/9fbQNN/by_merchant/
CPU: Intel Pentium G4560 3.5GHz Dual-Core Processor (₹5450.00 @ Amazon India)
Motherboard: MSI B250M MORTAR Micro ATX LGA1151 Motherboard (₹5726.59 @ Amazon India)
Memory: Corsair Dominator Platinum 8GB (2 x 4GB) DDR4-3000 Memory (₹6135.68 @ Amazon India)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (₹3699.00 @ Amazon India)
Case: BitFenix Nova ATX Mid Tower Case (₹3340.91 @ Amazon India)
Power Supply: Antec BASIQ 650W ATX Power Supply (₹4785.00 @ Amazon India)
Total: ₹29137.18
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-02 17:39 IST+0530