Which Article of the Constitution lays down that the Supreme Court may be required to express its opinion in two classes of matters in an advisory capacity as distinguished from its judicial capacity?

Option 3 : Article 143

The Correct Answer is Article 143.

• Article 143: Power of President to consult Supreme Court.
  1. If at any time it appears to the President that a question of law or fact has arisen, or is likely to arise, which is of such a nature and such public importance that it is expedient to obtain the opinion of the Supreme Court upon it, he may refer the question to that Court for consideration and the Court may, after such hearing as it thinks fit, report to the President its opinion thereon.
  2. The President may, notwithstanding anything in the proviso to article 131, refer a dispute of the kind mentioned in the said proviso to the Supreme Court for opinion and the Supreme Court shall, after such hearing as it thinks fit, report to the President its opinion thereon.