Step 1: Śrīmad Bhāgavata Purāṇa.
It is one of the most revered Purāṇas, dedicated to Lord Viṣṇu and especially Kṛṣṇa’s life and philosophy.
It traditionally contains about 18,000 Ślokas. Hence, A - IV.
Step 2: Bhaviṣya Purāṇa.
This Purāṇa focuses on prophecies and future events, hence called “Bhaviṣya.”
It is considered one of the largest Purāṇas with about 81,000 Ślokas. Hence, B - II.
Step 3: Skanda Purāṇa.
The Skanda Purāṇa is devoted to Lord Kārtikeya (Skanda).
It contains about 24,500 Ślokas. Hence, C - III.
Step 4: Matsya Purāṇa.
Dedicated to Matsya (the fish incarnation of Viṣṇu), it is one of the earliest Purāṇas.
It contains about 14,000 Ślokas. Hence, D - I.
Step 5: Conclusion.
Thus, the correct matching is: A - IV, B - II, C - III, D - I.