Answer:
Option A is the correct answer,no adjustment is needed.
Step-by-step explanation:
When related companies sell to each other,the sales transaction is not sales in actual sense,as it is likened to the left hand of an individual exchanging cash with the right hand,in other words, the cash is still owned by the same person.
The same concept is applicable to subsidiaries and parent,the sales recorded from a group perspective is when they sold to external third parties.
When sales happen between related companies, a provision for unrealized profits has to be made to the tune of inventory purchased from related companies not yet sold externally,as the whole of the goods have been to third parties, no such provision or adjustment is required.