Explanation:

Both statements are correct.
Statement 1 is correct: Assam Rifles is one of the six central armed police forces (CAPFs) under the administrative control of the Ministry of Home Affairs (MHA). The other forces being the Central Reserve Police Force (CRPF), the Border Security Force (BSF), the Indo-Tibetan Border Police (ITBP), the Central Industrial Security Force (CISF) and the Sashastra Seema Bal (SSB).

• It is the only paramilitary force with a dual control structure. While the administrative control of the force is with the MHA, its operational control is with the Indian Army, which is under the Ministry of Defence (MoD).

Statement 2 is correct: It is tasked with the maintenance of law and order in the North East along with the Indian Army and also guards the Indo-Myanmar border in the region.
How is it unique?

• It is the only paramilitary force with a dual control structure. While the administrative control of the force is with the MHA, its operational control is with the Indian Army, which is under the Ministry of Defence (MoD).
• This means that salaries and infrastructure for the force is provided by the MHA, but the deployment, posting, transfer and deputation of the personnel is decided by the Army.
• All its senior ranks, from DG to IG and sector headquarters are manned by officers from the Army. The force is commanded by Lieutenant General from the Indian Army.

Hence option 4th is correct.