Which one of the following is a phytoalexin

Options :
  1. Catechol
  2. Histamine
  3. Acetyl-choline
  4. Ipomeamarone

Answer and Explanation :-

Answer: Option 4


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What makes a hero? Courage, strength, morality, withstanding adversity? Are these the traits that truly show and create a hero? Is the light truly the source of darkness or vice versa? Is the soul a source of hope or despair? Who are these so called heroes and where do they come from? Are their origins in obscurity or in plain sight?
-Fyodor Dostoyevsky Notes from Underground