Third-party beneficiary:

A. A person who is not a party to a contract but who will benefit from the performance of a contract but has no right to sue if the contract is not performed Incidental beneficiary.

B. A person who is not a party to a contract but who the contracting parties meant to benefit from the contract and has rights to sue if the contract is not performed Intended beneficiary.

C. A person who is not a party to a contract but who will benefit by the performance of the contract

B. A person who is not a party to a contract but who the contracting parties meant to benefit from the contract and has rights to sue if the contract is not performed Intended beneficiary

Explanation:

Third party beneficiary is a person who may have the right to sue on a contract, despite not having originally been an active party to the contract

B, A person who is not a party to a contract but who the contracting parties meant to benefit from the contract and has rights to sue if the contract is not performed intended beneficiary

Explanation:

Like in the above answer, a third party beneficiary is simply a party C that is not initially included in a contract between party A and party B but that will benefit from the performance of the contract between parties Aand B.

As a third party in a contract, he/she can sue the non performance of the contract as it is in the power of the third party to.

Cheers.