A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic. It shows that there are two different ideas about secularism. This is a broad overview of the discussion. Why other lines are not chosen? The other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with "In Gandhiji's view," which means it needs more context. Paragraph 3 uses "Nehru's idea," which also needs context. Paragraph 4 starts with "Such secularism," which refers back to earlier ideas. Paragraph 5 starts with "Instead of doing any good," which is not a general statement.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion. It shows the negative outcome of the ideas discussed before. It gives a clear conclusion about the harm of the secularism mentioned.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects to Paragraph 1 because it gives more detail about Gandhiji's idea. This is a Broader to Specific Strategy. The first sentence talks about the difference, and the second sentence explains Gandhiji's view.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects to Paragraph 2 because it gives Nehru's idea as a contrast to Gandhiji's view. This is a Contrast strategy. The second sentence talks about Gandhiji, and the third sentence talks about Nehru.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects to Paragraph 3 because it explains why Nehru's idea is not good. This is a Cause and Effect Relationship. The third sentence describes Nehru's idea, and the fourth sentence shows the negative effect of that idea.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects to Paragraph 4 because it shows the harm of the secularism mentioned in the fourth paragraph. This is a Logical Order. The fourth sentence talks about the problem, and the fifth sentence explains the result of that problem.