Concept:The series is made of prime numbers where the difference between consecutive terms increases gradually.Explanation:The given numbers are 131, 137, 149, 163, and 181. All are prime. Differences: 6, 12, 14, 18. The next difference is 30 (since 181 + 30 = 211, a prime). 211 matches the pattern. Among options, 191, 193, 197 are primes but do not follow the gap sequence. Hence, the next term is 211.
