Answer is a is correct. While all the options are sources of international law, the Statute of the International Court of Justice (ICJ) lists them in a hierarchical order. Treaties are considered the most direct and primary source, as they are explicit agreements between states. Therefore, option (a) is the correct answer.

Answer is a is correct. Non-refoulement is a fundamental principle in international refugee law. It dictates that no state shall expel or return a refugee in any manner whatsoever to the frontiers of territories where his or her life or freedom would be threatened. Therefore, option (a) is the correct answer.

Answer is b is correct. A unilateral contract is a one-sided agreement where only one party makes an enforceable promise. An example is a reward offered for finding a lost item. The offeror is bound to pay the reward, but the person who finds the item is not bound to find it. Therefore, option (b) is the correct answer.

Answer is c is correct. Section 107 is a newly introduced provision under the BNSS, 2023, which deals with the attachment, forfeiture, or restoration of property in criminal proceedings. Therefore, option (c) is the correct answer.

Answer is b is correct. In Avatar Singh vs. State, the Supreme Court clarified that electricity, though subject to theft and regulation, is not classified as movable property under traditional property definitions. Therefore, option (b) is the correct answer.