Explanation:

- The given information uses a specific coding language:

- P @ Q: P is the son of Q

- P # Q: P is the father of Q

- P $ Q: P is the mother of Q

- P & Q: P is the husband of Q

- P % Q: P is the sister of Q

- P * Q: P is the daughter of Q

- Examining the first set of relations:

- H # A: H is the father of A

- A # C: A is the father of C

- C % B: C is the sister of B

- K & C: K is the husband of C

- K # L: K is the father of L

- H & G: H is the husband of G

- G % Z: G is the sister of Z

- From this, A is a male and a parent.

- Looking at the second set:

- A & D: A is the husband of D

- D $ B: D is the mother of B

- This shows that A is B’s father.

- M % L: M is the sister of L

- L * C: L is the daughter of C

- G $ A: G is the mother of A

- A @ H: A is the son of H

- Considering all relations:

- A (male) is the father of C/B

- C is B's sister

- K is C’s husband and father of L

- M is L’s sister, hence M is A’s granddaughter

- A is the Grandfather of M.

Option 4, Grandfather, is the correct answer.