Which of the following statements are true ofannealing of steels?1. Steels are heated to 500 to…

Which of the following statements are true ofannealing of steels?1. Steels are heated to 500 to 700°C.2. Cooling is done slowly and steadily.3. Internal stresses are relieved.4. Ductility of steel is increased.Select the correct answer using the codes given below:Codes:(a) 2, 3 and 4 (b) 1, 3 and 4(c) 1, 2 and 4 (d) 1, 2 and 3