Five jumbled-up sentences (labeled 1, 2, 3, 4, and 5), related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd sentence and key in the number of that sentence as your answer.

**Sentences:**
1. Boa Senior, who lived through the 2004 tsunami, the Japanese occupation, and diseases brought by British settlers, was the last native of the island chain who was fluent in Bo.
2. The indigenous population has been steadily collapsing since the island chain was colonized by British settlers in 1858 and used for most of the following 100 years as a colonial penal colony.
3. Taking its name from a now-extinct tribe, Bo is one of the 10 Great Andamanese languages, which are thought to date back to pre-Neolithic human settlement of Southeast Asia.
4. The last speaker of an ancient tribal language has died in the Andaman Islands, breaking a 65,000-year link to one of the world's oldest cultures.
5. Though the language has been closely studied by researchers of linguistic history, Boa Senior spent the last few years of her life unable to converse with anyone in her mother tongue.

Question

Five jumbled-up sentences (labeled 1, 2, 3, 4, and 5), related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd sentence and key in the number of that sentence as your answer.

**Sentences:**
1. Boa Senior, who lived through the 2004 tsunami, the Japanese occupation, and diseases brought by British settlers, was the last native of the island chain who was fluent in Bo.  
2. The indigenous population has been steadily collapsing since the island chain was colonized by British settlers in 1858 and used for most of the following 100 years as a colonial penal colony.  
3. Taking its name from a now-extinct tribe, Bo is one of the 10 Great Andamanese languages, which are thought to date back to pre-Neolithic human settlement of Southeast Asia.  
4. The last speaker of an ancient tribal language has died in the Andaman Islands, breaking a 65,000-year link to one of the world's oldest cultures.  
5. Though the language has been closely studied by researchers of linguistic history, Boa Senior spent the last few years of her life unable to converse with anyone in her mother tongue.

Accepted Answer

The sentences primarily discuss Boa Senior and the extinction of the Bo language in the Andaman Islands. Sentences 1, 3, 4, and 5 form a coherent paragraph about Boa Senior's life and her role as the last speaker of Bo. Sentence 2 shifts focus to broader historical events involving colonization and population collapse rather than directly addressing Boa Senior or the Bo language.

If arranged logically:

Sentence 4 introduces the death of the last speaker of an ancient tribal language.
Sentence 3 provides historical context about the Bo language's origins.
Sentence 1 elaborates on Boa Senior's life as the last native speaker.
Sentence 5 concludes with how Boa Senior could no longer converse in her mother tongue.
Thus, Sentence 2 does not fit within this narrative and is identified as the odd one out.