Need suggestions for new laptop

Lenovo G50-80 8GB RAM with i5 processor, i used this laptop and it is awesome with Graphic card also.

Lenovo IDEAPAD 310 (80TV00XXIH) @ Rs-41412 ( Launched Recently)
https://www.tatacliq.com/lenovo-ideapad-310-i5-...
i5 7th gen
8GB DDR4, 1TB HDD

@Amit007: Thought of highlighting the difference between i3 and i5 in an image below.

View image full size here.

For your work an i3 should be sufficient, however for a budget of Rs. 45000 it is recommended you go for an i5 since it is more powerful and future proof.
i5 processors are generally used for video production and editing, gaming, graphics, etc.

As for brand and models, will go deal hunting and let you know .

@Amit007: The laptops you can consider would be:
1) Acer Aspire E5-571 (i3 processor 5th Gen, 4GB RAM, 1TB HDD, 39.62 cm / 15.6 inch screen, DOS Operating System, black color variant) (shows as only 1 left in stock on my end) for Rs32800: http://www.amazon.in/Acer-Aspire-E5-571-Laptop-...
2) a) The i3 version:
-Lenovo G50-80 (80E502Q8IH) (i3 processor 5th Gen, 4GB RAM, 1TB HDD, 39.62 cm / 15.6 inch screen, DOS Operating System, black color variant). 1 RAM slot is empty, so you can add a 4 / 8 GB RAM in case you want to expand it further. Two reasons not to go for this model though would be DOS Operating System and i3 Processor (since you want to go for i5), otherwise this is a good option for Rs. 26,444 (costs Rs. 26,970 on Snapdeal): http://www.amazon.in/Lenovo-80E502Q8IH-15-6-inc...
b) The i5 version, rightly suggested by @typhoon:
-Lenovo G50-80 80E5038PIN Notebook (i5 processor 5th gen, 8 GB RAM, 1 TB HDD, 15.6 inch screen, Windows 10 Home Operating System, 2 GB Graphic Card, black color, weights 2.5 kg) for Rs. 44990: https://www.flipkart.com/lenovo-g50-80-core-i5-...
3) This is a good suggestion @shoaibmax2610, Lenovo Ideapad 310 (i5 processor 7th gen, 8GB RAM, 1TB HDD, 15.6 inch screen, DOS Operating System, 2GB graphic card, red color variant) for Rs. 41,412: https://www.tatacliq.com/lenovo-ideapad-310-i5-...
4) HP 240 G3 Core I3/ Window 8.1 Prof/ 1.7 GHz/14 inch, 4 GB RAM, 500 GB HDD/(K1V51PA)/ HP One good factor to keep in mind is the 3 years manufacture Warranty: http://www.amazon.in/HP-240-G3-K1V51PA-Warranty...
5) Dell Inspiron 3148 Toucscreen Laptop (i3 processor 4th gen, 4GB RAM, 500GB HDD, 11.6 inch, Windows 10 Operating System, Silver color) (shows as only 1 left in stock on my end) for Rs. 43,000 : http://www.amazon.in/Dell-Inspiron-11-6-inch-To...

Hope this helps .