The correct answer is option 3 (I and III) because R.K. Narayan and Mulk Raj Anand were two Indian English authors who received appreciation and encouragement from their British counterparts Graham Greene and E.M. Forster, respectively.
Here's the explanation:
R.K. Narayan and Graham Greene (Pair I)
Graham Greene, a renowned British novelist, played a crucial role in getting R.K. Narayan's works published internationally.
Greene admired Narayan's storytelling and simplicity and even helped him find publishers in England.
Mulk Raj Anand and E.M. Forster (Pair III)
E.M. Forster, the famous British author of A Passage to India, was a great supporter of Mulk Raj Anand.
Forster wrote the preface to Anand’s famous novel Untouchable (1935), which significantly boosted Anand’s recognition in literary circles.
Why the other pairs are incorrect:
Pair II (Nirad C. Chaudhuri and Evelyn Waugh)
While Nirad C. Chaudhuri was respected for The Autobiography of an Unknown Indian, there is no strong evidence that Evelyn Waugh played a direct role in promoting his work.
Pair IV (Raja Rao and Iris Murdoch)
Raja Rao was a well-known Indian English writer, but there is no record of Iris Murdoch encouraging or promoting his work.
Thus, the correct answer is I and III (Option 3).