The correct option is E observation
The option that has same context as the italicized word in both the sentences is Option E, observation. Observation means watching or monitoring. It also means a remark or a statement. The context of sentence I is that only his observation was pertinent to the topic. Second sentence means to put a check on the anti-social elements, monitoring posts were set up along the border. Option A 'View' means sight or perspective. Option B 'inspection' means careful examination. These two options A and B doesn't fit in sentence I. Option C 'notice' means observation and it also means announcement. Option D 'assertion' means claim or statement. So, C and D cannot be used in both the sentences. Thus, correct option is Option E, observation.