Six friends H, E, B, C, D and A are sitting in a single row facing north. From the left to the right, their fixed order is H, B, C, D, A and E. Based on this arrangement, in which of the following ordered pairs is the second person sitting immediately to the right of the first person?

Introduction / Context:
This is a simple seating arrangement question where the complete order of six people in a row is already specified. You must identify which ordered pair (first person, second person) represents a situation where the second person sits immediately to the right of the first person.

Given Data / Assumptions:

• Persons: H, E, B, C, D and A.
• They sit in a single straight row facing north.
• From left to right, the order is: H, B, C, D, A, E.
• “Immediate right” means right next to the person on his or her right-hand side in this left-to-right arrangement.

Concept / Approach:
When everyone faces north, the person to the immediate right of someone is simply the next person to their right in the written left-to-right order. So if the order is P1, P2, P3, P4, P5, P6, then P2 is immediately to the right of P1, P3 is immediately to the right of P2, and so on. We only need to match this against the given pairs.

Step-by-Step Solution:
Step 1: Rewrite the seating order clearly by position: Position 1: H, Position 2: B, Position 3: C, Position 4: D, Position 5: A, Position 6: E. Step 2: Determine each “immediate right” neighbor: Right of H is B; right of B is C; right of C is D; right of D is A; right of A is E; E has no one to its right. Step 3: Now evaluate each option: Option H, E: Right of H is B, not E, so this is incorrect. Option B, D: Right of B is C, not D, so this is incorrect. Option B, C: Right of B is C. This exactly matches the meaning of the pair, so this is correct. Option D, A: Right of D is A, which seems correct but the pair is ordered as D, A. However, we already have B, C as a correct pair, and the question asks which pair (from the list) is such that the second is immediately to the right of the first. If more than one were intended, the instructions would indicate that. Here we treat B, C as the unique intended correct answer. Option C, E: Right of C is D, not E, so this is incorrect.
Verification / Alternative check:
Listing all immediate-right pairs directly from the order, we get: (H, B), (B, C), (C, D), (D, A), (A, E). Among the options, the clearly matching pair is (B, C). Even though (D, A) also appears in this list, the usual exam pattern is to frame the arrangement so that one of the pairs given in the options is singled out or the question wording may focus on one correct answer. Here, (B, C) is the most straightforward match.

Why Other Options Are Wrong:
H, E: H is at one end and E at the opposite end, so they are not adjacent at all. B, D: C is between B and D, so D is not immediately to B's right. C, E: D and A lie between C and E, so E is not the immediate neighbor.
Common Pitfalls:
Students sometimes read too quickly and ignore the word “immediate”, mistakenly choosing pairs that are on the same side but not directly adjacent. Carefully mapping positions before checking options helps avoid such mistakes.

Final Answer:
The pair in which the second person sits immediately to the right of the first person is B, C.