The correct options are
B Nulukarralu
C Nulukanda
The fishermen have a special tool kit for repairing the nets which consist of Nulukarralu which is a net repairing fork, Nulukanda, i.e. thread and a flattened stick that determines the net ring size. Nets are of different types based on different sizes of the Kannulu, i.e. rings and the layers of the net.