(i) Porter
(ii) Claude
(iii) Fullam
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer-(d) i, ii and iii
Educational Website
(i) Porter
(ii) Claude
(iii) Fullam
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer-(d) i, ii and iii