Regarding the `No Confidence Motion` in the Parliament, the correct answer is option 4 - It can be introduced in the Lok Sabha only.

Option 1 states that there is no mention of it in the Constitution, which is incorrect. The No Confidence Motion is mentioned in Article 75(3) and Article 164(4) of the Constitution.

Option 2 states that a period of six months must lapse between the introduction of one No Confidence Motion and another, which is also incorrect. There is no such mandatory time period specified in the rules.

Option 3 states that at least 100 persons must support the motion before it is introduced in the House, which is again incorrect. A No Confidence Motion can be introduced by any member of the House, and there is no minimum number of supporters required.

Therefore, option 4 is the correct answer.