Different Case Statement Scenario in SQL Server

SELECT CASE WHEN 1=1 THEN 1 ELSE 0 END AS Comparsion_Result ---It'll Work

SELECT CASE WHEN 1=1 THEN '1' ELSE '0' END AS Comparsion_Result---It'll Work

SELECT CASE WHEN 'A'='B' THEN 'A' ELSE 'B' END AS Comparsion_Result---It'll Work

SELECT CASE WHEN 'A'='B' THEN 1 ELSE 0 END AS Comparsion_Result---It'll Work

/*Not Working*/

SELECT CASE WHEN 1=1 THEN 'A' ELSE 0 END AS Comparsion_Result---n't working

SELECT CASE WHEN 1=2 THEN 1 ELSE 'B' END AS Comparsion_Result---n't working

/*Below are the Same comparison as above these are working now*/

SELECT CASE WHEN 1=1 THEN 'A' ELSE 'B' END AS Comparsion_Result---It'll Work

SELECT CASE WHEN 1=2 THEN 'A' ELSE 'B' END AS Comparsion_Result---It'll Work

Reason: The output result is not converting into Int see the below error: