Four rational numbers between 3 and 4 are
3.1,3.2,3.8,3.9
To find four rational numbers between 3 and 4, multiply and divide 3 and 4 by 5, we get
3×55 and 4×55
⇒155 and 205
Between 155 and 205 lies 165,175,185,195
Now, from the given options (A) and (B) does not contain rational number between 3 and 4.
(C) has 4.1 and 4.2 that does not lie between 3 and 4.