In the two lists given below, List I provides the list of teaching methods, while List II indicates the factors helpful in rendering them effective. Match the two lists and choose the correct answer from the code given below.

List I (Teaching methods) List                                          II (Factors helpful in making them effective)

(a) Expository method                                            (i) Trust and openness in relationship

(b) Investigative method                                        (ii) Freedom to choose a theme and scope for frank exchange of ideas

(c) Discussion method                                           (iii) Creating a challenge to address the problems

(d) Personalised method                                       (iv) Systematic, step-by-step presentation

                                                                              (v) Maximising infrastructural support

Code:  (a)        (b)        (c)        (d)