Correct answer: (d) Chattogram (Chittagong)
Explanation
- A
Benapole
(a) Benapole. Benapole is a major land customs station with Petrapole, not the July 2020 Kolkata–Agartala containership sea port.
- B
Maloti
(b) Maloti. Not the Bangladeshi port used for that first containership.
- C
Payra
(c) Payra. Payra is a newer Bangladesh port; it was not the July 2020 transit port in the stem.
- D
Chattogram (Chittagong)
(d) Chattogram (Chittagong). The first containership from Kolkata to Agartala in July 2020 moved via Chattogram port of Bangladesh, then overland to Tripura. That port is the official key.
Summary. Official key is (d). The July 2020 Kolkata–Agartala containership used Chattogram (Chittagong), not Benapole, Maloti or Payra.