Correct option is B
Given: 395, 366, 337, 308, 279, ?
Logic: Difference of consecutive term is 29.
395 - 366 = 29
366 - 337 = 29
337 - 308 = 29
308 - 279 = 29
279 - ? = 29
279 - 29 = ?
? = 250
So, the missing term is 250.
Thus, correct option is (b).