This question involves a seating arrangement puzzle. We need to determine the position of each person based on the given clues and then find who is sitting second to the left of E.

Step-by-Step Deduction of Seating Arrangement

1. Initial Setup

There are seven people (A, B, C, D, E, F, G) sitting in a row facing north. We can represent the seven positions like this:

Positions: 1 2 3 4 5 6 7

Arrangement: _ _ _ _ _ _ _

2. Placing F

The clue states: "F sits on the extreme left end of the row." The extreme left end is position 1.

Arrangement: F _ _ _ _ _ _

3. Placing B

The clue states: "There are three persons between F and B." Since F is at position 1, the three persons are in positions 2, 3, and 4. Therefore, B must be in position 5.

Arrangement: F _ _ _ B _ _

4. Placing E

The clue states: "E has equal number of persons to his left and right side." In a row of 7 people, the middle position ensures an equal number of people on both sides. The middle position is the $\frac{7+1}{2} = 4^{th}$ position. So, E is in position 4.

Arrangement: F _ _ E B _ _

5. Placing G

The clue states: "G sits second from one of the ends." This means G could be in position 2 (second from the left) or position 6 (second from the right).

6. Placing C and A

The clues state: "A sits immediate right of C" (forming a block `CA`) and "A does not sit at the corner." The corners are positions 1 and 7. So, A cannot be in position 1 or 7.

7. Determining G's Position

We need to test the two possible positions for G:

• Possibility 1: G is at position 2.

  Arrangement: F G _ E B _ _

  Remaining positions: 3, 6, 7.

  Remaining people: A, C, D.

  We must place the `CA` block. If `CA` occupies positions 6 and 7, then A would be at position 7, which is a corner. This violates the condition. Thus, G cannot be at position 2.

• Possibility 2: G is at position 6.

  Arrangement: F _ _ E B G _

  Remaining positions: 2, 3, 7.

  Remaining people: A, C, D.

  We must place the `CA` block. Since A cannot be at the corner (position 7), the only place for the `CA` block is positions 2 and 3 (C at 2, A at 3).

  Arrangement: F C A E B G _

  This arrangement satisfies the condition that A is not at a corner (A is at 3).

  The last remaining person, D, must occupy the last available position, which is 7.

  Final Arrangement: F C A E B G D

8. Verifying the Final Arrangement

Let's check if the final arrangement F C A E B G D satisfies all conditions:

• 7 people in a row: Yes.
• F at the extreme left (1): Yes.
• G second from the right end (6): Yes.
• E in the middle (4) with equal people left/right: Yes (3 left, 3 right).
• 3 people between F(1) and B(5): Yes (C, A, E).
• A immediate right of C: Yes (C at 2, A at 3).
• A not at a corner: Yes (A is at 3).

All conditions are met.

Answering the Question

The question asks: "Who is sitting second to the left of E?"

In the final arrangement:

• E is at position 4.
• The person immediately to the left of E is at position 3, which is A.
• The person second to the left of E is at position 2.

Looking at the arrangement F C A E B G D, the person at position 2 is C.

Therefore, C is sitting second to the left of E.