During Diwali sale, company A gives ‘buy 4 sweaters and get 2 free’ offer, company B gives ‘buy 2 sweaters and get 3 free’ offer, and company C gives a discount of 5%. Which of the following is true? 1. A gives the best offer for the customer. 2. B gives the best offer for the customer. 3. Both A and B actually give the same offer. 4. C gives the best offer.