LED - Driving consequences in form of output function

Q.  What is/are the consequences of driving the LED in the form of an output function?
- Published on 12 Nov 15

a. Pin sources the current when made low without glowing LED
b. Pin sinks the current when made high without glowing LED
c. Pin sources the current when made high by glowing LED
d. Pin sinks the current when made low by glowing LED

ANSWER: Pin sinks the current when made low by glowing LED

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