- A no-confidence motion is a motion moved in the Lok Sabha to test the confidence of the House in the Council of Ministers. - Statement a: Rule 198 of the Rules of Procedure and Conduct of Business in Lok Sabha outlines the procedure for moving a motion of no-confidence. This rule requires the motion to be in writing and supported by at least 50 members. It does not require the motion to state the grounds on which it is based. The grounds are typically discussed during the debate on the motion. Therefore, statement a is incorrect. - Statement b: The procedures for admissibility of a no-confidence motion in Lok Sabha are indeed laid down in Rule 198 (Statement b is correct). - Statement c: Rule 198(3) states that a motion of no-confidence, once admitted, shall be taken up within ten days from the date on which the leave is granted (Statement c is correct). - Statement d: In Italy, which has a perfect bicameral system, the government (Council of Ministers) is accountable to both Chambers of Parliament (Chamber of Deputies and Senate of the Republic). Confidence votes can be sought or required in both houses. Therefore, the government generally requires the support of both houses (Statement d is correct).