Assertion: The iron and steel industry forms the base of all other industries and, therefore, it is called a basic industry. Reasoning: It provides raw material for other industries such as machine tools used for further production.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A. Both Assertion (A) and reasoning (R) are correct and but R is not the correct explanation of A. Assertion (A) is true but Reasoning (R) is not correct. Assertion (A) is not true but Reasoning (R) is correct.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

The iron and steel industry forms the base of all other industries and, therefore, it is called a basic industry. It is basic because it provides raw material for other industries such as machine tools used for further production. It may also be called a heavy industry because it uses large quantities of bulky raw materials and its products are also heavy.