I intend to buy a laptop for myself which would fulfil my needs,
Kindly advice me which laptop is best and what specifications should be for 3D Studio Max. AutoCAD, Rhino, Revit Architecture, Catia v6, Corel Draw, Photoshop, SolidWorks.
All kidding aside, for approximately $900 USD, you should be able to find a pretty darn good computer to run those cad programs. It wont be the highest in machine, but you should find something that wont be so frustrating and slow when rendering.
1.1868 is the factor to be multiplied along with the rate conversion because of excise duty and tax (for the products imported from US into India and then sold). For example, the reference GTX 970 was launched at 349$ and the equivalent at that time was 60 INR per USD and then the conversion rate was 24k INR. (Price reference to India's leading online shopping site - Flipkart - No reference card was released in India but the Zotac Nvidia GTX 970 was 27k INR at Nehru Place, Delhi).
The same price conversion when R9 270x was released.