Let's examine which of the given Articles were added by the 42nd CA: (1) Art. 24A: Does not exist in the Constitution. (Child labor is in Art 24). (2) Art. 28A: Does not exist in the Constitution. (3) Art. 39A: Equal Justice and Free Legal Aid. (Added by 42nd CA). (4) Art. 43A: Participation of workers in management of industries. (Added by 42nd CA). (5) Art. 46A: Does not exist in the Constitution. (Promotion of educational/economic interests of weaker sections is in Art 46). (6) Art. 48A: Protection and improvement of environment and safeguarding of forests and wild life. (Added by 42nd CA). (7) Art. 144A: Special provisions as to disposal of questions relating to the constitutional validity of laws. (Added by 42nd CA, but repealed by 43rd CA 1977). (8) Art. 323A: Administrative Tribunals. (Added by 42nd CA). From the provided list, Articles 39A, 43A, 48A, 144A, and 323A were added by the 42nd CA. There are five such articles in the list. The question asks for four articles. Option B lists articles corresponding to numbers 3, 4, 6, and 7 which are 39A, 43A, 48A, and 144A. All these four articles were indeed added by the 42nd CA. Other options include articles (24A, 28A, 46A) that do not exist. Option B contains four articles from the list that were added by the 42nd CA.