_________ is the data which is collected for the first time by investigators.
A. Published data
B. Primary data
C. Processed data
D. Secondary data

Hint: Here we must know what the types of data are and what they mean.
Data is the set of the raw values that are needed to form a particular purpose. There are various types of data like primary, secondary data, processed and published data

Complete step-by-step answer:
Primary data is the unique data which is set for some purpose by the person who is in research of something to be published or developed. So it is the raw form of the data. Hence it is the data that is collected for the first time by investigators.
Secondary data is the data that has already been collected for various purposes unlike the primary data and therefore it is not the raw form of the data. In this type of the data, the data can be collected by another person but is used by the investigator for his purpose and hence this is the secondary form of data as it is not used for the first time but has already been used.
Processed data is clear from the word itself that it is the data that has been sent for the analysis which may have combined data from various sources. It is the form of data that is also already been collected and used by the investigator and sent for its analysis and is therefore called the processed data.
Published data is the data that has been published after its proper analysis which may be for the publishing in the books. Internet, newspaper, etc.
Hence from all the four types of data discussed we get to know that primary data is the data that is used for the first time by investigators.
Hence B is the correct option.

Note: There are also many more types of data like discrete data, continuous data, etc.
Hence we must have the knowledge of types of data and the meaning of what they represent.