Correct option is B
Given:
Six persons: A, B, C, D, E, and F, were born on different dates: 12th, 14th, 18th, 19th, 4th, and 6th of the same month.
None of them were born after D, and D was born just after E
Only three people were born before A
Only two people were born between C and E
B was not born after C
From the given information birth chart diagram can be drawn-

The person born on the 12th is F.
Thus, correct option is (b)