Nagpur University — print missing in rtmnu chemistry textbook

Address:

Narendra Nagar, Nagpur, Maharashtra, 440015

Important reaction name was missing in rtmnu chemistry text book named as - alliance and co. University chemistry volume 3 for 3rd semester bsc. Published on 2018.
In section 2 of the book unit 4th lesson — (14) carboxylic acid, page number 184 point no 5. The whole reaction name was missing in every r issue of the book. Thing written was — f... R beta halo acid. So what is the name??? There i request you to please look after this. Thank you. Student of rtmnu.