List–I (Functions of Marketing)	List–II (Description/Function)
(A) Customer Support Services	(I) Classification of products into different groups
(B) Standardisation	(II) Identification of the needs of customers
(C) Grading	(III) Collection and analysis of market-related information
(D) Gathering and Analysing Market Information	(IV) Producing goods according to predetermined specifications

As per NCERT (Marketing Management – Functions of Marketing), each marketing function has a specific role in ensuring smooth exchange between the firm and the customers. Customer support services include after-sales service, complaint handling and assistance to buyers, which help in understanding and satisfying customer needs, so it matches with identification of the needs of customers (II). Standardisation refers to producing goods according to predetermined standards and specifications to maintain uniform quality, therefore it matches with producing goods of predetermined specifications (IV).

Grading means classifying products into different groups based on quality, size or features, so it corresponds to classification of products into different groups (I). Lastly, gathering and analysing market information involves collecting and studying market data to understand demand and trends, hence it matches with collection and analysis of market-related information (III). Therefore, the correct combination is (A)–(II), (B)–(IV), (C)–(I), (D)–(III).