The 106th term of the series a, b , b, c, c, c, d, d, d, d, e, e, e, e, e, .... is  Choose the correct answer:
A) h
B) k
C) l
D) o
E) r
a is one time, b,2 times so on...   so 106=n(n+1)/2..   0r n(n+1)= 212 ... now 15*16=240...14*15&lt;212 so n= 15. and 15th alphabet is O. ans o
<result>D</result>
The 106th term of the series a, b , b, c, c, c, d, d, d, d, e, e, e, e, e, .... is