Specification by Brand is used when: Select one:

A customer always compares (smart phone Samsung / Apple / HTC / Sony etc)  several same class products, before going for one in particular. So Option (c) appears me to be right answer.

My answer is B.It also can be assume as product recognition,used for marketing purpose to promote the quality of the products.

 C    as it is the mean of brand product means ,, 

Correct answer is option b) <<<<<<<<<<<<<

I would say B: Products that are well know for their quality.

Dear Wasi, I assume you mean specification by brand on the RFQ

in case yes, b. products are well known for their quality and this specific brand matches the customer requirement

Also this is needed only when you are buying from multiple local retailers and not direct from the manufacturer / exclusive agent of the specified brand.

b. products are well known for their quality

c. it is required to evaluate among several manufacturer's products

 

>>>>>>>>>>> My answer will be option c. it is required to evaluate among several manufacturer's products.