the(1975) 1 SCC 70. State executive authority must be subject to rule of law and must be informed by reason. So, whatever be the activity of the public authority, in such monopoly or semi-monopoly dealings, it should meet the test of Article 14 of the Constitution. If a Governmental action even in the matters of entering or not entering into contracts, fails to satisfy the test of reasonableness, the same would be unrea- sonable. In this connection reference may be made to E.P. Royappa v. State of Tamil Nadu & Anr., [1974] 4 SCC 3; Maneka Gandhi v. Union of India & Anr., [1976] 1 SCC 248; Ajay Hasia & Ors. v. Khalid Mujib Sehravardi & Ors., [1981] 1 SCC 722; R.D. Shetry v. International Airport Authority of India & Ors., [1979] 3 SCC 1 and also Dwarkadas Marlaria and sons v. Board of Trustees of the Port of Bombay, [1989] 3 SCC 293. It appears to us that rule of reason and rule against arbitrariness and discrimination, rules of fair play and natural justice are part of the rule of law applicable in situation or action by State instrumentality in dealing with citizens in a situation like the present one. Even though the rights of the citizens are in the nature of contractual rights, the manner, the method and motive of a decision of entering or not entering into a contract, are subject to judicial review on the touchstone of relevance and reasonableness, fair play, natural justice, equality and nondiscrimination in the type of the transactions and nature of the dealing as in the present case."