Step 1: Understanding the question.
The question is asking what is made by adding manganese to pig iron. The correct answer is steel. Manganese is added to iron to create steel, which has improved strength and durability.
Step 2: Analyzing the options.
(A) इस्पात: Correct — Steel is made by adding manganese to pig iron to improve its properties.
(B) सोना: This is incorrect; gold is a precious metal and not related to manganese in the context of steel production.
(C) अभ्रक: This is incorrect; Mica is not related to manganese and iron.
(D) चाँदी: This is incorrect; silver is not produced by adding manganese to iron.
Step 3: Conclusion.
The correct answer is (A) इस्पात, as steel is made by adding manganese to pig iron.