Added response for graphql query

src/guides/v2.3/graphql/product/customizable-option-interface.md

@@ -205,7 +205,9 @@ Attribute | Type | Description
 
 The following query returns information about the customizable options configured for the product with a `sku` of `xyz`.
 
-```text
+**Request:**
+
+```graphql
 {
   products(filter: {sku: {eq: "xyz"}}) {
     items {
@@ -225,3 +227,30 @@ The following query returns information about the customizable options configure
   }
 }
 ```
+
+**Response:**
+
+```json
+{
+  "data": {
+    "products": {
+      "items": [
+        {
+          "id": 1,
+          "name": "T-shirt",
+          "sku": "xyz",
+          "__typename": "SimpleProduct",
+          "options": [
+            {
+              "title": "Image",
+              "required": false,
+              "sort_order": 1,
+              "option_id": 1
+            }
+          ]
+        }
+      ]
+    }
+  }
+}
+```