**Core Concept**
The question is testing the concept of modes of transmission in infectious diseases. In epidemiology, a carrier is an individual who harbors and transmits a pathogen to others, but may not necessarily exhibit symptoms themselves.

**Why the Correct Answer is Right**
The correct answer refers to a carrier who receives the source of infection from an already infected carrier. This type of transmission is known as **covert or covert carriage**, where the pathogen is transmitted from one individual to another, often through close contact or contaminated surfaces. This mode of transmission is particularly relevant in the spread of infectious diseases in healthcare settings.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specifically describe the transmission of infection from one carrier to another. It may refer to a different mode of transmission, such as direct contact or vector-borne transmission.
**Option B:** This option is incorrect because it is not a recognized term in epidemiology. It may be a distractor to confuse the test-taker.
**Option C:** This option is incorrect because it is not a specific mode of transmission. It may refer to a general category of transmission, but it does not accurately describe the transmission of infection from one carrier to another.

**Clinical Pearl / High-Yield Fact**
To remember the concept of covert carriage, consider the mnemonic "COVERT": Carrier-to-Other, Over-the-Counter, Verbal, Exposed, Repeated Transmission. This mnemonic can help you recall the key points of covert carriage and its importance in epidemiology.

**Correct Answer:** B.