In Three word analogy type of questions, a group of three inter-related words is given. The candidate is required to trace out the relationship among these three words and choose another group with similar analogy, from among the alternativesprovided.
Pen : Pencil : Ink
Clearly, Pen contains ink and pencil belongs to the same category as pen i.e. stationery.
Similarly, orange contains juice and banana belongs to the same category as orange i.e. fruits.
Hence, the answer is (a).