Question

HCN is found in which of the green fodder?

• A. Rice
• B. Maize
• C. Napier
• D. Sorghum

Hint:

Young or drought stressed sorghum has hydrocyanic acid.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
HCN is hydrocyanic acid, a poison. The question asks which green fodder can contain it. The passage warns that sorghum fed young or under drought stress has high HCN.

Step 2: Check option (1).
Rice is not used as green fodder and has no known HCN problem, so this is wrong.

Step 3: Check option (2).
Maize is safe as green fodder and has no dangerous HCN content, so this is wrong.

Step 4: Check option (3).
Napier grass is a safe, high yielding grass fodder with no HCN issue, so this is wrong.

Step 5: Check option (4).
Sorghum contains the glucoside dhurrin, which releases HCN. Young plants and drought stressed crops are most dangerous, so this is correct.

Final Answer:
Sorghum contains HCN. This is option (4). \[ \boxed{4} \]