Explanation:

Article 8, Draft Constitution, 1948

• All laws in force immediately before the commencement of this Constitution in the territory of India, in so far as they are inconsistent with the provisions of this Part, shall, to the extent of such inconsistency, be void.

The State shall not make any law which takes away or abridges the rights conferred by this Part and any law made in contravention of this clause shall, to the extent of the contravention, be void:

• Provided that nothing in this clause shall prevent the State from making any law for the removal of any inequality, disparity, disadvantage or discrimination arising out of any existing law.

(3) In this article, the expression "law" includes any Ordinance, order, bye-law, rule, regulation, notification, custom or usage having the force of law in the territory of India or any part thereof.

• Article 13 (Draft Article 8) was debated in the Constituent Assembly on the 25th, 26th and 29th November 1948.  It declared that any law inconsistent with Part III would be void.

Hence option 1st is correct.