Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statement(s).

Statement :- 

Rakesh is senior to Rajesh and Rajesh is senior to Rahul.
Conclusions
I. Rakesh is senior to Rahul.
II. Rahul is not senior to Rakesh.​​

Statement :- 

Rakesh is senior to Rajesh and Rajesh is senior to Rahul.

From this, we can logically infer:

Rakesh is senior to Rajesh, who is senior to Rahul,
Therefore, Rakesh is senior to Rahul.

Conclusions:
I. Rakesh is senior to Rahul.

This directly follows from the statements.

II. Rahul is not senior to Rakesh.​​

If Rakesh is senior to Rahul, then Rahul cannot be senior to Rakesh, so this also logically follows.

So, both Conclusions I and II follows.

Thus, correct option is (c).