A word has been given in the question and has been used in the sentences given below. Identify the statements where the word has been used in a contextually and grammatically correct manner. If the word has been used incorrectly in all the statements, mark option “None of these” , as your answer.

State
(I) The witness was asked to state the events leading up to the murder-incident to provide a clear account of what happened.
(II) The teacher asked the student to state the answer to the math problem on the board
(III) The musician attempted to state his guitar to create a melodious tune, but the instrument needed tuning badly.

The correct answer is both (I) & (II).

Let's analyze the usage of the word "State" in each of the given sentences:

1. Meaning of "State":
As a verb, "state" means to express something clearly in speech or writing, or to specify/declare a fact, opinion, or answer.

2. Sentence Analysis:

Statement (I): "The witness was asked to state the events leading up to the murder-incident to provide a clear account of what happened."
Here, "state" is used correctly as a verb meaning to express or describe the events clearly.

Statement (II): "The teacher asked the student to state the answer to the math problem on the board"
Here, "state" is used correctly as a verb meaning to declare or present the answer clearly.

Statement (III): "The musician attempted to state his guitar to create a melodious tune, but the instrument needed tuning badly."
Here, "state" is used incorrectly. The appropriate verb for adjusting an instrument's sound to create a melodious tune would be "tune" or "play", not "state".

Therefore, the word "State" has been used in a contextually and grammatically correct manner in both statements (I) and (II).