Explanation:

- Article 108 - This article provides for a joint sitting of both the Houses of Parliament—Lok Sabha and Rajya Sabha—in certain cases to resolve deadlocks on bills. It is convened by the President of India.

- Article 110 - This pertains to “Money Bills” which can only be introduced in the Lok Sabha. It is unrelated to joint sittings.

- Article 128 - Addresses the attendance of retired judges at sittings of the Supreme Court, not related to joint sittings of Parliament.

- Article 75 - Relates to the appointment of the Prime Minister and other ministers, unrelated to joint sittings.

- Correct Answer: Option 4 - Article 108