Consider the following regarding essential functional operations of a digital data acquisition system:1. Handling of analog signals2. Converting the data to digital form and handling it3. Making the measurement4. Internal programming and telemetryWhich of the above are valid in the stated context?

Consider the following regarding essential functional operations of a

1.	Consider the following regarding essential functional operations of a digital data acquisition system:1. Handling of analog signals2. Converting the data to digital form and handling it3. Making the measurement4. Internal programming and telemetryWhich of the above are valid in the stated context?
A.	1, 2, 3 and 4
B.	1, 3 and 4 only
C.	1, 2 and 3 only
D.	2 and 4 only
Answer» D. 2 and 4 only