Five jumbled sentences (labelled 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 out and key in the number of that sentence as your answer.

1. The profound emotional impact of music has inspired ongoing research into its relationship with emotions.
2. Music is a universal phenomenon that utilizes a myriad brain resources.
3. This inherent connection to musical expression is deeply intertwined with human identity and experience.
4. The proclivity to create and appreciate music is ubiquitous among humans, permeating daily life across diverse societies.
5. Engaging with music is among the most cognitively demanding tasks a human can undergo, and it is identified across cultures.

The sentences largely describe music as a universal, complex part of human life. They focus on how music appears in all cultures and is deeply connected to how people think and experience the world.

Sentences 2, 4, 3, and 5 follow a logical order. Sentence 2 starts the paragraph by saying music is universal and based in the brain. Sentence 4 adds to this discussion that making and enjoying music is common in all societies and daily life. Sentence 3 connects this idea to human identity and experience. Sentence 5 supports the point by showing that engaging with music requires complex thinking and is found in many cultures. 

Sentence 1 does not fit in with the others. Instead of describing what music is or how it works everywhere, it talks about research inspired by music’s emotional effects. This brings in a discussion about science, not about music itself. Therefore, the odd sentence out is 1.