Select the correct Active/Passive form of the given sentence.

Jonathan said to Sam, “It’s 10 O’clock by my watch.”

Jonathan told Sam that it was 10 O’clock by his watch.

The correct active/passive form of the given sentence is Jonathan told Sam that it was 10 O’clock by his watch.

The sentence is in the simple past tense, which is used to describe an action that happened in the past. The active voice of the sentence is formed by putting the subject of the sentence before the verb and removing the word "to." In this case, the subject of the sentence is "Jonathan" and the verb is "tell." So, the active form of the sentence is "Jonathan told Sam that it was 10 O’clock by his watch."

The other options are incorrect because:

• Jonathan told Sam that it is 10 O’clock by his watch." This sentence is in the present tense, but the verb "is" is incorrect. The correct form of the verb is "was."
• Jonathan told to Sam that it was 10 O’clock by his watch." The word "to" is unnecessary in this sentence.
• Jonathan told Sam that it was 10 O’clock by my watch." The word "my" is incorrect. The word "his" should be used instead.