Element 9 C question 50

Question:

9C50 - How may the polarity of the leads of an LED be identified prior to installation in a circuit?  
 
A. The cathode lead is usually longer than the anode lead.  [correct answer]
B. There may be a flat edge on the body near the anode.
C. If the cathode can be seen, it is usually smaller.
D. The ground lead is usually lighter in color.

Challenger's excerpt:

Question [EL9-C3-50] talks about LED identification. I think that both the FCC question pool answers and your answers are wrong... I believe the anode lead is normally longer than the cathode lead, not vice/versa.

Response:

Challenger is correct.  I haven't found any reference to the cathode lead being longer.

Recommendation

Change question to:

9C50 - How may the polarity of the leads of an LED be identified prior to installation in a circuit?  
 
A. The cathode lead is usually smaller than the anode lead.  [correct answer]
B. There may be a flat edge on the body near the anode.
C. If the cathode can be seen, it is usually smaller.
D. The ground lead is usually lighter in color.