Correct Option: B

Given that , The average weight of five persons sitting in a boat = 38 kg.
Sum of weight of five persons = 5 × 38 = 190
The average weight of the boat and the persons sitting in the boat = 52 kg.
Sum of weight of the boat and five persons = 6 × 52 = 312
∴ Weight of the boat = Sum of weight of the boat and five persons – Sum of weight of five persons
Weight of the boat = 312 – 190 = 122 kg