Direction: The given incomplete table shows the number of pencils sold in two shops A and B in a week. Sunday Monday Tuesday Wednesday Thursday Friday Saturday A 3 6 12 21 B 4 8 20 On which two days respectively did the shops A and B sell the same number of pencils?

• A.  Thursday, Wednesday
• B.  Wednesday, Thursday
• C.  Tuesday, Wednesday
• D.  Wednesday, Tuesday