The correct answer to the question is option 4, which states that neither statement 1 nor statement 2 is correct. Let`s analyze each statement individually to understand why this is the correct answer.

Statement 1: "In India, mica production is confined to Bihar only." This statement is incorrect. While Bihar is indeed a significant producer of mica in India, it is not the only state where mica production takes place. Other states such as Jharkhand, Rajasthan, and Andhra Pradesh also contribute to mica production in India.

Statement 2: "In India, gold production is confined to Karnataka only." This statement is also incorrect. While Karnataka is one of the major states for gold production in India, it is not the only state where gold production occurs. Other states like Andhra Pradesh, Jharkhand, and Rajasthan also have significant gold reserves and contribute to gold production in India.

Therefore, both statements are incorrect, and the correct answer is option 4, which states that neither statement 1 nor statement 2 is correct.