Step 1 — Fix the birth order from the clues:
• Saurav is the eldest; Janki is the youngest; Rohit was born just before Janki.
• The first three births are sons; then come two daughters.
A consistent sequence (derived earlier) is:
1) Saurav, 2) Mahi, 3) Nilesh, 4) Kuntala, 5) Tamanna, 6) Arun, 7) Rohit, 8) Janki.
Step 2 — Understand “born in succession” (ignore order):
Two children are “in succession” if their birth positions differ by exactly 1 (adjacent in the list), regardless of who is older.
Step 3 — List all successive pairs implied by the order:
(Saurav, Mahi), (Mahi, Nilesh), (Nilesh, Kuntala), (Kuntala, Tamanna), (Tamanna, Arun), (Arun, Rohit), (Rohit, Janki).
Step 4 — Check the queried pair:
Kuntala is 4th and Arun is 6th. Their positions differ by 2, so they are not in succession.
Conclusion:
The pair that was not born in succession is Kuntala and Arun.
Answer: (B): Kuntala and Arun.