To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) Captcha - This option is correct because Captcha is a widely used anti-automation technique. It is used to distinguish between humans and automated bots by presenting a challenge that is easy for humans to solve but difficult for bots.
Option B) Session Mgmt - Session management is not specifically an anti-automation technique. It is used to manage user sessions and maintain state between requests.
Option C) Whitelisting of inputs - Whitelisting of inputs is not necessarily an anti-automation technique. It is a security practice that involves allowing only pre-approved or trusted inputs and blocking all others.
Option D) Blacklisting of inputs - Blacklisting of inputs is not an anti-automation technique. It involves creating a list of known malicious inputs and blocking them. However, it is not effective against new or unknown types of attacks.
The correct answer is A) Captcha. This option is correct because Captcha is a commonly used anti-automation technique to differentiate between humans and bots.