Article 15 of the Indian Constitution deals with the prohibition of discrimination against any citizen on grounds of religion, race, caste, sex or place of birth. It states that the State shall not discriminate against any citizen on grounds only of religion, race, caste, sex, or place of birth.

both statements are individually true, and statement II is the correct explanation of statement I. The Constitution of India is indeed a liberal Constitution, emphasizing democratic values, individual rights, and freedoms. Statement II clarifies that it achieves this liberal character by providing Fundamental Rights to individuals, which are essential elements of a liberal democratic framework, ensuring citizens' liberties and equal protection under the law.

A concave mirror is used in a solar cooker. Specifically, a concave mirror focuses sunlight onto a small area, increasing the intensity of the sunlight and generating heat. This concentrated sunlight is then used for cooking in solar cookers, harnessing solar energy for practical applications.