“…In 2008, Javaid et al initiated the study of constant metric index by investigating it for three families of regular networks, and asked for the investigation of more such families possessing the constant metric index [9]. In this regard, a number of research articles have been published on various families of regular networks such as families of Harary networks, Caylay networks, circulant networks, generalized Petersen networks fullerence networks, to name a few [6], [7], [9], [17], [26]- [31]. With this article, we extend the study of constant metric index by exploring one more family of regular networks, namely a family of choral ring networks CR η (1, 3, 5).…”