Identify the phonetic alphabet word for the letter 'J'.

The phonetic alphabet word for the letter 'J' is 'Juliet.' This term is part of the NATO phonetic alphabet, which is used to ensure clear communication, especially over radio and telephone transmissions where misunderstanding letters can lead to confusion. Each letter of the alphabet is represented by a distinct word to avoid ambiguity.

For instance, 'Juliet' is specifically assigned to 'J' to provide clarity in verbal communication. Its use is critical in various fields such as military, aviation, and emergency services, where precision in spelling could be vital for safety and operational effectiveness. The other choices do not correspond to the letter 'J'; instead, they represent other letters: 'K' for Kilo, 'L' for Lima, and there is no official use of 'Mango' in the phonetic alphabet. Thus, 'Juliet' is the correct representation for 'J.'