Step 1: Concept Overview:
The question requires identifying the novel from the list that was NOT written by R. K. Narayan.
Step 2: Detailed Analysis:
Analyzing the authorship of each book:
\[\begin{array}{rl} \bullet & \text{The Guide (1958): Authored by R. K. Narayan; recipient of the Sahitya Akademi Award. } \\ \bullet & \text{Untouchable (1935): Written by Mulk Raj Anand; a significant work depicting the life of an outcaste. } \\ \bullet & \text{Malgudi Days (1943): A collection of short stories by R. K. Narayan, based in Malgudi. } \\ \bullet & \text{The English Teacher (1945): A semi-autobiographical novel by R. K. Narayan. } \\ \end{array}\]Therefore, Untouchable was not written by R. K. Narayan.
Step 3: Answer:
The answer is (B).