Eight persons work across three cities: Delhi, Pune, and Hyderabad. Each city has at least two persons, and the number of males and females in each ci...

Eight persons work across three cities: Delhi, Pune, and Hyderabad. Each city has at least two persons, and the number of males and females in each city is equal. There are four married couples spanning two generations, and no married couple works in the same city. The designations held by these persons in descending order of seniority are: GM, AGM, CEO, Manager, Assistant Manager, PO, Clerk, and Sub staff. Only three persons are senior to the only son of B. B does not work in Pune. E is the sister-in-law of G, who holds the junior-most position. H is the son-in-law of D, who is immediately senior to A. F is the spouse of C; neither works in Delhi. The number of posts above the father-in-law of A equals the number of posts below the sibling of A. Only C and H work in Hyderabad. Only PO and Sub staff work in Delhi. The spouse of E does not work in Delhi. G is the daughter-in-law of B, who is the spouse of D. F is senior to H but junior to C.

Question: How many persons are junior to H?