Statement: Kartik left for Delhi on Tuesday by train to attend a function to be held on Friday at his uncle's house in Delhi.
Assumptions:
1. Kartik may reach Delhi on Wednesday.
2. Kartik may reach Delhi before Friday.
Answer: B
Clearly, it cannot be deduced as to which day Kartik would reach Delhi. But Kartik has left for Delhi to attend a function to be held on Friday. So, he must have planned his journey to reach Delhi before Friday. Thus, only II is implicit.