Correct option is A
Statement:
"Drop the mail in the mailbox", said John to his assistant.
Assumptions:
1: The assistant knows the address where the mail needs to be sent.
The statement only mentions dropping the mail in the mailbox; it does not specify whether the assistant knows the address.
The mailbox could be a general collection box, so this assumption is not necessarily implicit.
2: The assistant will follow orders.
John is instructing his assistant, implying that he expects the assistant to follow his orders.
This assumption is implicit.
Only assumption 2 is implicit.
Thus, correct option is (a).