Explanation:

- When an employee agrees with the employer not to take up similar work after leaving the job, this is called a "restraint of trade" agreement.

- According to Section 27 of the Indian Contract Act, any agreement that restricts someone from practicing a lawful profession, trade, or business is generally void.

- Exceptions exist for the sale of goodwill, where reasonable restrictions are allowed, but not for ordinary employment contracts.

- Hence, such non-compete agreements in standard employment contracts are not enforceable by law and are considered void.

Correct Answer: Option 2 - Void