In the context of online shopping on Amazon, which of the following is the in house digital payment service that the company uses as its primary payment gateway on the platform?

Introduction / Context:
This question tests knowledge of e commerce and digital payments. Large online marketplaces often develop their own branded payment gateways or wallets, which are tightly integrated with their websites and apps. Amazon has built its own payment solution that works across the Amazon marketplace and on many partner sites. For exam preparation, knowing the brand names associated with each company helps in questions related to banking, finance, and technology.

Given Data / Assumptions:

• The question is about the payment gateway used by Amazon.
• The focus is on the in house or proprietary payment service associated with Amazon.
• Several well known third party payment gateways are listed as distractors.
• We assume the question refers to mainstream consumer facing branding and not internal technical payment processors.

Concept / Approach:
E commerce platforms can either integrate external payment gateways or create their own branded digital payment solutions. Amazon has developed Amazon Pay, which allows users to pay for purchases on Amazon and on external merchant websites using payment information stored in their Amazon accounts. It functions both as a checkout method and as a digital wallet in many markets. Hence, the correct answer should match this in house brand name rather than an independent payment company.

Step-by-Step Solution:
Step 1: Read the stem carefully and note that the question asks which payment gateway Amazon uses. Step 2: Recall that Amazon has its own payment service known as Amazon Pay, which is visible at checkout on Amazon orders. Step 3: Recognise that CCAvenue, Payzippy, Citrus Pay, and Razorpay are independent payment gateway companies that serve many merchants. Step 4: Match the description of an in house Amazon payment gateway with the option Amazon Pay. Step 5: Conclude that the most accurate answer among the options is Amazon Pay.

Verification / Alternative check:
You can verify this by recalling typical Amazon checkout screens. When you proceed to pay, the branding for the wallet and payment service clearly says Amazon Pay in many regions. In addition, Amazon Pay is also offered on third party websites with a button that lets customers pay using their Amazon credentials. None of the other options is owned by Amazon, and they are usually seen on a wide variety of non Amazon sites.

Why Other Options Are Wrong:

• CCAvenue: A popular independent payment gateway in India that serves multiple merchants, but it is not Amazon's proprietary solution.
• Payzippy: Was a payment service from Flipkart and not from Amazon, and it is no longer widely used.
• Citrus Pay: Another independent payment company that was acquired by PayU and does not represent Amazon's brand.
• Razorpay: A major Indian fintech payment gateway provider, but again not owned or branded by Amazon.

Common Pitfalls:
A common mistake is to think that large companies always rely on third party providers and to select a familiar payment gateway like CCAvenue or Razorpay. Another pitfall is not distinguishing between a marketplace and a payment brand. Candidates may also confuse Amazon Pay with unrelated payment apps if they do not regularly shop on Amazon or pay attention to branding during checkout.

Final Answer:
The in house digital payment service used by Amazon as its primary payment gateway is Amazon Pay, so the correct option is Amazon Pay.