State which of the following statements hold foe perceptron learning law?

• A. it is supervised type of learning law
• B. it requires desired output for each input
• C. ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫wij= ¬¨¬®¬¨¬µ(bi ‚Äö√Ñ√∂‚àö√ë‚àö¬® si) aj
• D. all of the mentioned