After the display is selected by second port, then the digit (LED) glows for a duration of

After the display is selected by second port, then the digit (LED) gl

1.	After the display is selected by second port, then the digit (LED) glows for a duration of
A.	5 msec
B.	10 msec
C.	2 msec
D.	6 msec
Answer» B. 10 msec