The Border Security Force is India's border guarding organisation at its borders with Pakistan and Bangladesh. It is one of the seven Central Armed Police Forces of India. This is for your information that BSF/CRPF is an exempted organisation under Section 24 of the RTI Act, 2005. They only respond to those matters which relates to corruption and Human rights.
If the RTI is related to corruption/Human Rights violation, you can file RTI.