Which of the words listed below has undergone Nasal Assimilation? A. input B. control C. symphony D. crucifixion

The word that has undergone Nasal Assimilation from the list is "input".

Here's the step-by-step explanation:

Nasal assimilation is a phonological process that occurs when the place of articulation of a nasal consonant changes to match the place of articulation of a following consonant.

In the word "input", the nasal consonant /n/ changes its place of articulation to match the following consonant /p/, which is a bilabial sound. So, instead of the typical alveolar /n/ sound, it becomes a bilabial nasal sound, similar to /m/. This is why "input" is often pronounced more like "imput". This is a clear example of nasal assimilation.

The other words - "control", "symphony", and "crucifixion" - do not show this process.