Step 1: Understanding the Concept:
This question tests the rule for verb forms following the auxiliary verb 'do' (in its forms 'do', 'does', 'did') in negative sentences.
Step 2: Key Formula or Approach:
The grammatical structure for negative sentences in the simple present and simple past is:
Subject + do/does/did + not + [base form of the verb].
Step 3: Detailed Explanation:
The sentence uses "does not". According to the rule, the verb that follows must be in its base form (the infinitive without 'to').
- (A) agreed: This is the past tense form. Incorrect.
- (B) agree: This is the base form of the verb. Correct.
- (C) to agree: This is the full infinitive form. Incorrect.
- (D) agreeing: This is the present participle/-ing form. Incorrect.
The correct sentence is: "Praveen does not agree with Mohan."
Step 4: Final Answer:
After the auxiliary construction "does not", the base form of the verb is required. Therefore, option (B) is the correct answer.