Based on following case study and answer the question. 

Supriya started a garment manufacturing unit. Her objective was to maximise her sales in the very first year. For this she used aggressive selling technique. She got her firm registered with name "Styles Et Styles', which provided distinct identity to her firm. She used the most common tool for promotion, which is an impersonal form of communication. She started giving discount vouchers of her sister's accessories house. For sales promotion, she also started putting up her stalls in exhibitions in order to draw the attention of public.

Identify which sales promotion tool was used for impersonal communication?

Advertising

The correct answer is option (2)- Advertising.

The sales promotion tool used for impersonal communication in Supriya's case is Advertising. 

• The Case Study Clue: The text mentions she "used the most common tool for promotion, which is an impersonal form of communication."

•  In NCERT it is clearly mentioned that "Advertising is perhaps the most commonly used tool of promotion." 

NCERT: Advertising is perhaps the most commonly used tool of promotion. It is an impersonal form of communication, which is paid for by the marketers (sponsors) to promote some goods or service. The most common modes of advertising are ‘newspapers’, ‘magazines’, ‘television’, and ‘radio’.

Why the others don't fit:

• Personal Selling: This is a personal form of communication involving direct interaction between the salesperson and the customer.

• Publicity: While impersonal, it is generally not a "tool" the firm has direct control over in the same way as advertising (it's often unpaid and comes from third parties).

• Public Relations: This is a broader strategic communication process that builds mutually beneficial relationships, rather than being the "most common impersonal tool" for immediate sales promotion.