Question

Read the sentences given below :-
I. I do not know whether he will come or not.
II. I do not know that he will come or not.
Choose the correct answer from the options given below :

• A. I is correct but II is incorrect
• B. I is incorrect but II is correct
• C. Both I and II are correct
• D. Both I and II are incorrect

Answer 1

The Correct Option is A

To determine which sentence is correct, let's analyze the sentences given:

1. Sentence I: "I do not know whether he will come or not."
2. Sentence II: "I do not know that he will come or not."

Explanation:

• In Sentence I, the use of the word "whether" is appropriate for expressing doubt or uncertainty followed by alternatives, such as "or not." This sentence structure is correct and commonly used in English.
• Sentence II uses the word "that." The word "that" is used to introduce clauses that are factual or known information rather than uncertainty or alternatives. Therefore, using "that" in this context to indicate a choice or uncertainty is incorrect.

Conclusion:

• Sentence I is correct because it accurately expresses uncertainty with the proper conjunction "whether."
• Sentence II is incorrect because it uses "that" inappropriately for expressing doubt with alternatives.

Thus, the correct answer is: I is correct but II is incorrect.