Explanation:

- H was born immediately before G, so H is one year older than G.

- Gap of six years between C and D, and D is younger than C.

- Sum of ages of E and F is 57. Thus, if E is 27 (born in 1993), F must be 30 (born in 1990).

- Age difference between A and B is four years, with A older than B.

- Base year is 2020, which means finding out the birth years.

- H is older than E; E isn’t the youngest.

Let’s arrange based on the above:

- 1963: (57 years) – C

- 1967: (53 years) – D (younger than C, 6 year gap)

- 1973: (47 years) – A

- 1979: (41 years) – B (A is older by 4 years)

- 1984: (36 years) – Not used yet

- 1989: (31 years) – Possible for F but E+F doesn’t add up to 57

- 1992: (28 years) – Possible for G, H one year elder so 1991 or 1990 possible

- 1999: (21 years) – E, younger than H

Therefore, H is born in 1989.

The answer is: Option 4: H