"BHUMI SAVALIYA 04 January 2018 if saler is registered n purchaser non registered ..then under reverse charge saler have to pay gst is it true??"
Generally, Seller has to pay GST as he is the one who earns income from the transaction. If the seller is unregistered, the buyer has to pay tax under RCM(Reverse Charge Mechanism) under section 9(4) of CGST Act, 2017.
As per Section 9(3), RCM is applicable for some goods only out of which Silk yarn is one. So, unless your client is purchasing silk yarn he doesn't have to pay tax under RCM.
Hence in my view, the supplier of your client is not correct in saying Reverse Charge will be applicable.
it is just reverse if the seller is unregistered the buyer has to pay under reverse charge . since in your case all your customer are unregistered you should avoid taking registration unless it cross limit
Composition is preferred, rightly said, Manas. Also the compliances are comparatively less.
Only drawback is that, if your customer is registered non-composition dealer, he cannot claim input tax credit on purchases made from you, since you'll be a composition dealer.