Answer is b is correct. Valid Hindu marriage requires monogamy and no prohibited degrees of relationship. Therefore, option (b) is the correct answer.

Answer is c is correct. BNS Section 1(2) applies to offences within India and those committed outside by Indian citizens. Therefore, option (c) is the correct answer.

Answer is a is correct. Section 81 provides for marshalling of securities in mortgage cases. Therefore, option (a) is the correct answer.

Answer is a is correct. Supreme Court held that Fundamental Rights take precedence over DPSPs. Therefore, option (a) is the correct answer.

Answer is a is correct. Section 5 permits condonation of delay upon showing sufficient cause. Therefore, option (a) is the correct answer.