Sandra and Myriam Are Two Monozygotic Twins Who Live in a Nice

Sandra and Myriam are two monozygotic twins who live in a nice neighbourhood just outside the city. The two girls attend a private school a few blocks away from their house. In their free time, they love to take horse riding lessons and play in the garden. Thomas and Kevin are two monozygotic twins who live in a neighbourhood which is known for its high level of air pollution. As a result, the boys often suffer from chest infections. Thomas and Kevin attend a state school and in their free time they love playing videogames and walk around in the neighbourhood. Their parents work until very late at night and the boys often consume their dinner at a local fast-food. Based on this information, in which pair of twins it's very likely to find a higher heritability index for intelligence?