The correct answer is (a). The Hill State Council was established on 25th June, 1967. It was a semi-autonomous body that was responsible for the administration of the hill areas of Meghalaya. The Council was dissolved in 1972, when Meghalaya became a full-fledged state of India.
The Hill State Council was established in response to the demands of the hill people of Meghalaya for greater autonomy. The Council was given powers over matters such as education, health, agriculture, and forests. It also had a say in the appointment of officials in the hill areas.
The Hill State Council was not without its problems. There were allegations of corruption and nepotism. The Council was also criticized for not doing enough to improve the lives of the people in the hill areas.
Despite its problems, the Hill State Council played an important role in the history of Meghalaya. It helped to bring about greater autonomy for the hill people and to improve their lives.
The other options are incorrect. Option (b) is incorrect because the Hill State Council was established in 1967, not 1968. Option (c) is incorrect because the Hill State Council was established in 1967, not 1969. Option (d) is incorrect because the Hill State Council was established in 1967, not 1970.