The correct answer is option 1, article 323 A of the Indian Constitution. Under this article, the decision of the Central Administrative Tribunal (CAT) can be challenged in the Supreme Court.

Article 323 A provides for the establishment of administrative tribunals to resolve disputes and grievances related to recruitment, conditions of service, promotions, and disciplinary matters concerning public servants. The CAT is one such administrative tribunal set up under this article.

If an aggrieved party is not satisfied with the decision of the CAT, they can approach the Supreme Court for further recourse. The Supreme Court has the power of judicial review and can examine the legality and correctness of the CAT`s decision. This ensures that there is a proper forum for the redressal of grievances and the protection of the rights of public servants.