Step 1: Author recall.
The environmental-themed piece "Polythene Bag" is attributed to Puran Singh.
Step 2: Distractors.
Other options are notable poets/writers but not linked to this text.
Step 3: Conclusion.
Thus (B) Puran Singh.
“One of these days you’re going to talk yourself into a load of trouble,” her father said aggressively. What do you learn about Sophie’s father from these lines? (Going Places)