UPSC Civil Services 2020 Prelims General Studies Paper II

Three Statements S1,S2 and S3 are given below followed by a Question:
S1:C is younger than D, but older than A and B.
S2: D is the oldest.
S3:A is older than B.
Question :
Who among A,B,C and D is the youngest?
Which one of the following is correct in respect of the above Statements and the Question?