Hi smile,
Use COALESCE function.
Refer below query.
SQL
CREATE TABLE #Questions
(
    [ID] INT ,
	[Question] VARCHAR (20) ,
	[Is_Yes] VARCHAR (20),
	[Is_No] VARCHAR (20),
	[Is_Clear] VARCHAR (20),
	[Is_Yes1] VARCHAR (20),
	[Is_No1] VARCHAR (20),
	[Is_Clear1] VARCHAR (20),
)
  INSERT INTO #Questions VALUES (01,'Sentence one.','Ok','','','','No','')
  INSERT INTO #Questions VALUES (02,'Sentence tow.','','No','','Ok','','')
  INSERT INTO #Questions VALUES (03,'Sentence three.','Ok','','','','','Unclear')
  INSERT INTO #Questions VALUES (04,'Sentence four.','','','Unclear','','No','')
  INSERT INTO #Questions VALUES (05,'Sentence five.','','No','','Ok','','')
 
SELECT [ID],[Question],
	COALESCE(NULLIF(Is_Yes,''), COALESCE(NULLIF(Is_No,''), Is_Clear)) AS 'Remark',
	COALESCE(NULLIF(Is_Yes1,''), COALESCE(NULLIF(Is_No1,''), Is_Clear1)) AS 'Status'
FROM #Questions
DROP TABLE #Questions
Output
| ID | Question | Remarks | Status | 
| 1 | Sentence one. | Ok | No | 
| 2 | Sentence two. | No | Ok | 
| 3 | Sentence three. | Ok | Unclear | 
| 4 | Sentence four. | Unclear | No | 
| 5 | Sentence five. | No | Ok |