To answer this question, the user needs to know what verification means in the context of software development. Verification is the process of evaluating a system or component to determine whether it meets the specified requirements and satisfies its intended purpose. With that in mind, let's evaluate each option:

A. Helps to check the Quality of the built product: This option is correct. Verification helps to check the quality of the built product by ensuring that the product meets the specified requirements and is fit for its intended purpose.

B. Helps to check that we have built the right product: This option is correct. Verification helps to ensure that we have built the right product by checking that it meets the specified requirements and satisfies its intended purpose.

C. Helps in developing the product: This option is incorrect. Verification is a process that occurs after the product has been developed to ensure that it meets the specified requirements and is fit for its intended purpose. It does not help in developing the product.

D. Monitoring tool wastage and obsoleteness: This option is incorrect. Verification is not concerned with monitoring tool wastage and obsoleteness.

Therefore, the correct answer is:

The Answer is: A and B.