(a) Ring like growth
(b) A peg like protuberance
(c) A spiral outgrowth
(d) A perforation in the plate
Ans. b
(30)
5/5 - (1 vote)
(a) Ring like growth
(b) A peg like protuberance
(c) A spiral outgrowth
(d) A perforation in the plate
Ans. b
(30)