P and S1 Corporations have filed consolidated tax returns for several years. S1 acquires all of S2

Question:

P and S1 Corporations have filed consolidated tax returns for several years. S1 acquires all of S2 Corporation’s stock at the close of business on June 15 of the current year. Which of the following current year transactions are intercompany transactions?
a. S1 sells machinery (Sec. 1245 property) to S2 on September 1.
b. P sells inventory to S1 throughout the year.
c. S2 performs services for S1 throughout the year.
d. P sells inventory to the S1-S2 on July 23. S1 and S2 are equal partners in the Partnership
A legal form of business operation between two or more individuals who share management and profits. A Written agreement between two or more individuals who join as partners to form and carry on a for-profit business. Among other things, it states...