The States Reorganisation Act of 1956 led to the formation of:

The correct answer is: A) Andhra Pradesh

The States Reorganisation Act of 1956 was an act of the Parliament of India that reorganized the states of India on linguistic lines. The act came into force on 1 November 1956.

The act led to the formation of 14 new states, including Andhra Pradesh. Andhra Pradesh was formed by merging the Telugu-speaking areas of the erstwhile Madras Presidency and Hyderabad State.

The other options are incorrect because:

• Telangana was formed in 2014 by splitting Andhra Pradesh.
• Maharashtra was formed in 1960 by merging the Marathi-speaking areas of the erstwhile Bombay State and Hyderabad State.
• Karnataka was formed in 1956 by merging the Kannada-speaking areas of the erstwhile Madras Presidency, Hyderabad State, and Mysore State.