Assertion (A): Results from popular web search engines are usually having high recall, but an indexing database can provide high precision.
Reason(R): Indexing databases use controlled vocabulary which is a carefully selected list of words and phrases that are used to tag units of information (document or work) so that they may be more easily retrieved.
1
Both (A) and (R) is true.
2
(A) is true, but (R) is false.
3
Both (A) and (R) are false.
4
(R) is true, but (A) is false.
5
Question Not Attempted