Rishitin is a phytoalexin produced by –

Correct option is A

Correct option (a) Potato
· Rishitin is a sesquiterpenoid phytoalexin.
· Produced by potato in response to Phytophthora infestans infection.
Other options:
· (b) Mustard – Produces brassinin.
· (c) Wheat – Produces other phenolics.
· (d) Cotton – Produces gossypol.