A dishonest shopkeeper professes to sell pulses at the cost price, but he uses a false weight of 980gm. for a kg.His gain is …%.	Choose the correct option:
A) 2.04 %  B) 5.36 %  C) 4.26 %  D) 6.26 %  E) 7.26 %

Rationale: "his percentage gain is 100 * 20 / 980 as he is gaining 20 units for his purchase of 980 units . so 2.04 % . . answer : a"
Answer: A