Under Section 103 of the BNS, 2023, murder committed under certain aggravating circumstances attracts enhanced punishment. Which of the following is such an aggravating circumstance? 

Section 103(2) of the BNS, 2023 provides that when a group of five or more persons acting in concert commits murder on the ground of race, caste or community, sex, place of birth, language, personal belief or any other similar ground, each member of such group shall be punished with death or with imprisonment for life, and shall also be liable to fine. This is the sole aggravating circumstance statutorily enumerated in Section 103 - there is no enhanced category for offenders previously convicted of an offence punishable with imprisonment of seven years or more, nor any aggravation based on the time, place or weapon of the murder. Murder generally is punishable under Section 103(1) with death or imprisonment for life, and shall also be liable to fine.