Question: Iterations of Apriori Algorithm terminate after finding only one 4 - item frequent itemset as { P , Q , R , S } ,

Iterations of Apriori Algorithm terminate after finding only one 4-item frequent itemset as {P, Q, R, S}, where {P},{Q},{R} and {S} are few 1-item itemsets. What is true about all the frequent itemsets for the involved transactions?
Group of answer choices
Minimum of 16 frequent itemsets, but exact count is indeterminate.
Minimum of 15 frequent itemsets, but exact count is indeterminate.
Exactly 16 frequent itemsets
Maximum of 15 Closed frequent itemsets

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