Given that, a young girl started calling:
- Thumb – $1,9$
- Index Finger – $2,10$
- Middle Finger – $3,11$
- Ring Finger – $4,12$
- Little Finger – $5,13$
- Ring Finger – $6,14$
- Middle Finger – $7,15$
- Index Finger – $8,16$
From the above information, we can get the pattern: $1,9,17,25, \dots$
We can write, $8n+1, n=0,1,2, \dots$
She counted upto $1994$
That means, $1994 \% 8 = 2$
$\therefore$ If she counted upto $1994,$ she ended on her index finger.
Correct Answer $: \text{B}$