Select the correct option to test your answer: A Carbon and other alloying elements get oxidised from the weld pool B Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld C Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld D Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld Correct Answer: Option C (Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld) Verified correct option for Chemical Engineering (Chemical Engineering Basics).