S1. Awareness about one's own personality type is very important. S2. Self-awareness is a difficult goal for most people. The second statement:

The first statement asserts the importance of self-awareness about one's personality. The second statement points out that self-awareness is difficult for most people. The two statements do not directly contradict each other (one is about importance, the other about difficulty), nor does the second confirm the first. Rather, the second presents a contrasting picture — while it is important, it is also hard to achieve. 'Contrasts' best captures this relationship as the two statements present opposing facets of the same idea. 'Contrapuntal' is too literary/musical a term and doesn't fit the logical relationship here. Hence (d) contrasts the first is the most apt choice.