Choose the correct tense form of the verb in the bracket to complete the sentence.
My uncle ________ (want) to know how I am doing my business.

The correct answer is Option B (wanted).

Key Points:
• This question tests the use of stative verbs (verbs of perception, thought, or emotion like *want*, *know*, *like*, *understand*), which are generally not used in continuous tenses.
• Grammar Rule:
• Stative verbs like 'want' are rarely used in the continuous form (-ing).
• Since the second clause uses 'am doing' (present) but refers to a past inquiry or general state, or if we look at standard narrative past, wanted is the standard past form.
• Let's check options: 'was wanting' (incorrect continuous form of stative verb), 'have wanted', 'want', 'wanted'.
• In past narrative contexts, 'My uncle wanted to know...' is grammatically flawless.
• Key Takeaway: Stative verbs like 'want' do not take continuous forms. The simple past form 'wanted' is correct.