Step 1: Understanding the Mīmāmsā schools and their epistemic positions.
Kumārila Bhaṭṭa is associated with the Pūrva Mīmāmsā school and is known for his emphasis on six Pramāṇas, which include perception, inference, comparison, verbal testimony, non-perception, and postulation.
Prabhākara, another scholar of the Pūrva Mīmāmsā school, accepted five Pramāṇas, rejecting non-perception and postulation as valid.
Step 2: Analyzing the options.
(P) Kumārila Bhaṭṭa accepts six Pramāṇas, which corresponds to (iv).
(Q) Prabhākara accepts five Pramāṇas, which corresponds to (iii).
Step 3: Conclusion.
Therefore, the correct combination is (A): (P) and (iv); (Q) and (iii).