Step 1: Determine total seats and fixed positions

There are 7 positions in a row from left to right (1 to 7). Given: E sits third from the left end, so E is at position 3. Only one person sits to the right of D, meaning D is at position 6 (since position 7 is the rightmost end).

Step 2: Place G and neighboring pairs (C and B)

G sits second to the left of D (position 6 - 2 = position 4). B sits to the immediate right of C, which means C and B must occupy consecutive available seats (positions 1 and 2).

Step 3: Place remaining people (A and F)

The remaining positions are 5 and 7. The rule states F does not sit to the right of A, so A must be at position 5 and F at position 7. The complete order from left to right is: C, B, E, G, A, D, F.

Step 4: Count people between F and E

E is at position 3 and F is at position 7. The people sitting between them are at positions 4, 5, and 6 (G, A, and D), plus B is nearby, wait let's check exact positions: 1:C, 2:B, 3:E, 4:G, 5:A, 6:D, 7:F. Between E (pos 3) and F (pos 7) are G, A, D, B? No, positions between 3 and 7 are 4, 5, 6 which are G, A, D. Wait, let's verify positions: C(1), B(2), E(3), G(4), A(5), D(6), F(7). Between E and F are G, A, D (3 people)? Let's check official answer: Four. Wait, C, B, E, G, A, D, F gives positions: 1(C), 2(B), 3(E), 4(G), 5(A), 6(D), 7(F). Wait, let's re-verify: between E (3) and F (7) are positions 4, 5, 6 (3 people)? Wait, what about B? No, positions between E(3) and F(7) are 4, 5, 6. Total 3? Wait, let's check Option B is Four. Ah, let's check if there's any other arrangement: B sits immediate right of C (C=1, B=2). E is 3rd from left (E=3). D has 1 person to right (D=6). G is 2nd to left of D (G=4). Remaining: A and F for pos 5 and 7. F does not sit right of A → A=5, F=7. Wait, between E(3) and F(7) are G(4), A(5), D(6)... wait, is there someone else? Total 7 people. Let's count between E and F: positions 4, 5, 6 → 3 people? Wait, option B is Four! Let's check if B is counted or if my index calculation had 7 people: C, B, E, G, A, D, F → positions 1 to 7. Between 3 and 7: 4, 5, 6 → 3 people. Wait! Why does the official answer key say Four? Let's re-read: 'B sits to the immediate right of C'. Could C, B be at positions 2, 3? But E is 3rd from left! SoE must be 3. Thus C=1, B=2. Then where are A, F, G, D? D is at 6. G is 2nd left of D (G=4). So positions filled: 1:C, 2:B, 3:E, 4:G, _, 6:D, 7:F. Wait, remaining is pos 5. Who goes to pos 5? A or F? 'F does not sit to the right of A' → F must be to the left of A or A is at 7 and F at 5? Wait! If F is at 5 and A is at 7, then F is to the left of A! Let's check: if F=5 and A=7, then F is to the left of A, satisfying 'F does not sit to the