Complex sentence: The Shaheen-II is an medium range ballistic missile (MRBM), a longer ranged variant of the Shaheen-I missile and currently the most advanced ballistic missile in service with the Pakistani Armed Forces.
Split into simpler sentences: The Shaheen-II is an medium range ballistic missile (MRBM), a longer ranged variant of the Shaheen-I missile. It is currently the most advanced ballistic missile in service with the Pakistani Armed Forces.