Concept:
Contractual capacity is a foundational principle of the Indian Contract Act, 1872. Section 11 of the Act specifies who is "competent to contract," and it explicitly mentions that every person is competent provided they are of the age of majority.
Step 1: Defining a Minor's Capacity.
Under the Indian Majority Act, 1875, a minor is anyone under the age of 18. According to the landmark case Mohori Bibee v. Dharmodas Ghose, it was established that any contract with a minor is not just "voidable," but void-ab-initio (void from the very beginning).
$\text{Minor's Agreement} = \text{Void-ab-initio}$
Step 2: Analyzing the Statements.
• Statement A: True. This is the legal definition of a minor.
• Statement B: True. Minors cannot vote, marry, or be held liable for contracts in the same way adults are.
• Statement D: True. Natural or legal guardians are responsible for them.
Step 3: Identifying the Falsehood.
Statement (C) claims that a minor's agreement is a "valid legal document." This is legally incorrect. Since a minor is deemed incapable of understanding the consequences of a contract, the law protects them by making such documents invalid and unenforceable in court.
Final Answer: Option C