Under drought the sorghum plants synthesize Dhurin in

Answer: Option A

1. Dhurin Synthesis: Dhurin is a cyanogenic glycoside synthesized by sorghum plants under drought conditions.

2. Location of Synthesis: During drought stress, sorghum plants primarily synthesize Dhurin in their roots.

3. Purpose: Dhurin serves as a defense mechanism for the plant against herbivores and pests.

Therefore, the correct answer is Option A: Roots.