What were the first intelligible words to be ever recorded on a telephone on March 10, 1876?

A. Hello
B. Hi
C. Mr Watson, come here. I want to see you.
D. Graham Bell is speaking

Explanation:

The first intelligible words to be ever recorded on a telephone on March 10, 1876, were ‘Mr Watson, come here. I want to see you. ‘ Summoning his assistant Thomas Watson, Alexander had placed his first-ever phone call in his Boston laboratory.