Consider the following pairs regarding landmark Public Interest Litigation Cases in India: Case | Related to 1. Hussainara Khatoon vs. State of Bihar (1979) | Under-trial prisoners case 2. Sunil Batra vs. Delhi Administration (1980) | Case related to torture of prisoners 3. M. C. Mehta vs. Union of India (1991) | Environment protection case How many of the above pairs are correct?

Hussainara Khatoon vs. State of Bihar (1979)

• It is regarded as the first Public Interest Litigation of India. It exposed the plight of under-trial prisoners in Bihar who had been in jail for periods longer than the maximum sentence for their offences, and the Supreme Court held that speedy trial is a fundamental right under Article 21. Hence, pair 1 is correctly matched.

Sunil Batra vs. Delhi Administration (1980)

• The case arose out of a letter written by a prisoner about the torture of a fellow inmate. The Court treated the letter as a writ petition and held that prisoners retain their fundamental rights and cannot be subjected to inhuman treatment. Hence, pair 2 is correctly matched.

M. C. Mehta vs. Union of India

• The series of petitions filed by M. C. Mehta led to landmark judgments on environmental protection, including the cleaning of the Ganga, protection of the Taj Mahal from the Mathura refinery, control of vehicular pollution in Delhi and the evolution of the principles of absolute liability and the polluter pays principle. Hence, pair 3 is correctly matched.