Q.Salesmanship works mainly through:

The question tests the essential, defining feature of salesmanship as against other selling methods.

Options (a), (b) and (d) are impersonal selling methods, not salesmanship.

Salesmanship is defined as the personal and persuasive skill of convincing a prospective buyer. Its defining feature is direct human contact — the salesman meets the buyer, understands his need and persuades him face to face.

Why (c) is correct. Direct personal persuasion of the buyer is the very essence of salesmanship; it is what distinguishes salesmanship from other, impersonal, forms of selling.

Why the others are wrong.

• (a) Advertising in newspapers is an impersonal method of selling (part of promotion), not salesmanship.
• (b) Self-service counters involve no personal persuasion at all — the customer serves himself.
• (d) Television commercials are again impersonal advertising, reaching a mass audience with no individual persuasion.

All three are methods of selling in the broad sense, but only personal persuasion is salesmanship.

Do not pick advertising or TV commercials — they are impersonal selling/promotion, not salesmanship. The key word to look for is 'personal'.