The applications of shift registers are 1. Time delay2. Ring counter3. Serial to parallel data conversion4. Serial to serial data conversion Which of the above are correct?

The applications of shift registers are 1. Time delay2. Ring counter3.

1.	The applications of shift registers are 1. Time delay2. Ring counter3. Serial to parallel data conversion4. Serial to serial data conversion Which of the above are correct?
A.	1, 2, 3
B.	2, 3, 4
C.	1, 2, 3, 4
D.	1, 2, 4
Answer» D. 1, 2, 4