Concept:Letter series where the gap between consecutive letters increases by 1 each time.Explanation:Write the positions of the given letters: B=2, C=3, E=5, H=8, L=12.Find the differences: 3−2=1, 5−3=2, 8−5=3, 12−8=4.The differences are 1,2,3,4, so the next difference is 5.Add this to the last position: 12+5=17.The 17th letter of the alphabet is Q.
