Eight individuals are employed across three cities: Delhi, Pune, and Hyderabad. Each city has at least two employees, and the number of males and fema...

Eight individuals are employed across three cities: Delhi, Pune, and Hyderabad. Each city has at least two employees, 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 individuals, in descending order of seniority, are GM, AGM, CEO, Manager, Assistant Manager, PO, Clerk, and Sub staff. Only three people are senior to B's only son. 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, and neither works in Delhi. The number of positions above A's father-in-law equals the number of positions below A's sibling. Only C and H work in Hyderabad. Only PO and Sub staff work in Delhi. E's spouse does not work in Delhi. G is the daughter-in-law of B, who is married to D. F is senior to H but junior to C.

Question: Who is the immediate junior as well as the immediate senior of the persons working in Delhi?