Option (b) is correct.

A red herring fallacy occurs when someone introduces irrelevant information or a side issue that distracts from the main point or argument. In this case, the person making the argument is accusing the other person of avoiding them based on the fact that they were neither in their class nor in the laboratory when called. However, the location of the person at the time of the call is not necessarily relevant to the accusation of avoidance.

The person making the argument is using the irrelevant information about the person's whereabouts as a distraction or diversion from addressing the actual issue of why they might be avoiding them. It shifts the focus away from the main point and tries to create a sense of guilt or wrongdoing based on unrelated circumstances.

विकल्प (b) सही है।

दिये गये कथन में रेड हेरिंग तर्क दोष है। यह तर्कशास्त्रीय दोष तब होता है जब वास्तविक मुद्दे से ध्यान को भटकाकर, पहले मुद्दे से संबंधित केवल बाह्यतः मायने रखने वाले मुद्दे पर ध्यान केंद्रित किया जाता है।